Synchronous belt mold adjusting structure of injection molding machine

Abstract

The utility model discloses a synchronous belt mold adjusting structure of an injection molding machine, which relates to the field of plastic processing and comprises a rear mold plate and a driving motor, four corners of the rear mold plate are respectively provided with a first pull rod, a second pull rod, a third pull rod and a fourth pull rod, and synchronous belts are arranged between the four pull rods and the driving motor for transmission connection. Compared with the prior art that gear meshing is adopted to adjust the mold, the mold adjusting structure is driven by the synchronous belt, and the rotating direction between the driving motor and the pull rod is kept consistent. The system is high in response speed, light in weight, low in cost and convenient to control.

Description

TECHNICAL FIELD

[0001] The utility model relates to the processing field of plastics, specifically relates to a synchronous belt die adjusting structure of injection molding machine. BACKGROUND

[0002] The current toggle hydraulic injection molding machine locking part adopts an oil motor to drive a gear ring to rotate, the gear ring is engaged with a rear nut, so the rear nut rotates under the driving of the gear ring. Under the pushing of the rear nut, the rear mold plate of the locking part moves on the pull rod, so as to realize the purpose of adjusting the mold thickness of the locking part. However, this method of adjusting the mold has problems such as high energy consumption, low speed, and low control precision.

[0003] As disclosed in the announcement number CN207564897U, the die adjusting structure of the locking mechanism and the injection molding machine has a driving wheel driving a central gear wheel and four small gears around the gear wheel to engage and adjust the mold.

[0004] Based on the problems of the above-mentioned oil motor driven gear ring mold adjusting scheme, a motor driven synchronous pulley mold adjusting scheme is proposed. Compared with the former, the motor driven synchronous pulley mold adjusting scheme can not only greatly reduce the consumption of electric quantity, but also can accurately control the number of rotations of the rear nut through the controller, so as to realize more precise mold adjusting. At the same time, the synchronous belt transmission is used instead of the gear transmission, the installation of the gear ring is saved, the weight of the whole machine is reduced, the cost of the machine is effectively controlled, and the light weight requirement of the modern machine is met. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a synchronous belt injection molding machine die adjusting structure, which reduces the weight and assembly difficulty of the die adjusting mechanism. The further purpose of the utility model is to effectively reduce the cost of the equipment while ensuring high die adjusting precision. Another purpose of the utility model is to make the rotation direction of the pull rod the same as the rotation direction of the motor input, which is convenient for control.

[0006] The utility model achieves the above technical purposes through the following technical means.

[0007] A synchronous belt mold adjusting structure of an injection molding machine, comprising a rear mold plate and a driving motor, the four corners of the rear mold plate are respectively provided with a first pull rod, a second pull rod, a third pull rod and a fourth pull rod, and the four pull rods are provided with synchronous belt transmission connection between the driving motor.

[0008] Further, a motor mounting seat is connected between the driving motor and the rear mold plate, and a first synchronous belt transmission connection is provided between the output part of the driving motor and the first pull rod and the third pull rod.

[0009] Further, symmetrically arranged on the motor mounting base are tension pulley sliding grooves, and movable tension pulleys parallel to the pull rods are arranged in the tension pulley sliding grooves.

[0010] Preferably, on the motor mounting base, a first tension pulley sliding groove is arranged between the output end of the driving motor and the first pull rod, and the fixed position of the movable tension pulley on the first tension pulley sliding groove is adjustable.

[0011] On the motor mounting base, a second tension pulley sliding groove is arranged between the output end of the driving motor and the third pull rod, and the fixed position of the movable tension pulley on the second tension pulley sliding groove is adjustable.

[0012] Further, a second synchronous belt transmission connection is arranged between the first pull rod and the second pull rod, and a fixed tension pulley is arranged on the side of the second synchronous belt close to the driving motor and in contact with the second synchronous belt.

[0013] Preferably, a third synchronous belt transmission connection is arranged between the third pull rod and the fourth pull rod, and a fixed tension pulley is arranged on the side of the third synchronous belt close to the driving motor and in contact with the third synchronous belt.

[0014] Preferably, a rear nut is arranged around each of the four pull rods, the rear nut is hingedly connected to the rear mold plate, an inner thread is arranged at the position where the rear nut is in contact with the pull rod, and the synchronous belt is in transmission connection with the rear nut.

[0015] Further, the rear nut in contact with the first pull rod is in cooperative installation with the first synchronous belt and the second synchronous belt.

[0016] The rear nut in contact with the third pull rod is in cooperative installation with the first synchronous belt and the third synchronous belt.

[0017] Further, a friction ring is arranged at the position where the lower end surface of the rear nut is in contact with the rear mold plate, a compression cover is in cooperative installation with the upper end surface of the rear nut, and a friction ring is arranged between the compression cover and the upper end surface of the rear nut.

[0018] Further, a mold locking oil cylinder is arranged at the central position of the rear mold plate.

[0019] The utility model has the following beneficial effects:

[0020] Compared with the prior art which adopts gear engagement to adjust the mold, the mold adjusting structure in the utility model drives through the synchronous belt, and the rotation directions of the driving motor and the pull rods are consistent. The response speed is fast, the weight is small, the cost is low, and the control is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1It is a side view of the utility model.

[0022] Figure 2 It is a plan view of the utility model.

[0023] Figure 3 It is a side view of the utility model.

[0024] Figure 4 It is Figure 1 It is a local enlarged view of A in the middle.

[0025] In the figure, 1 is a first pull rod, 2 is a second pull rod, 3 is a third pull rod, 4 is a fourth pull rod, 5 is a mold locking oil cylinder, 6 is a first tensioning wheel sliding groove, 7 is a second tensioning wheel sliding groove, 8 is a movable tensioning wheel, 9 is a first synchronous belt, 10 is a driving motor, 11 is a motor mounting seat, 12 is a rear mold plate, 13 is a fixed tensioning wheel, 14 is a second synchronous belt, 15 is a third synchronous belt, 16 is a limiting rod, 17 is a rear nut, 18 is an internal thread, 19 is a friction ring, and 20 is a gland. DETAILED DESCRIPTION

[0026] The utility model will be further described below in combination with the drawings and specific embodiments, but the protection scope of the utility model is not limited to this.

[0027] Example one:

[0028] As Figures 1 to 4 shown, a synchronous belt mold adjusting structure of an injection molding machine, including rear mold plate 12 and driving motor 10, the four corners of rear mold plate 12 are respectively provided with first pull rod 1 and second pull rod 2 and third pull rod 3 and fourth pull rod 4, and four pull rods are provided with synchronous belt transmission connection between driving motor 10.

[0029] The synchronous belt mold adjusting structure is mainly composed of the following components: rear mold plate 12, driving motor 10, motor mounting seat 11, first pull rod 1, second pull rod 2, third pull rod 3, fourth pull rod 4, first synchronous belt 9, second synchronous belt 14, third synchronous belt 15, movable tensioning wheel 8, fixed tensioning wheel 13, rear nut 17, internal thread 18, friction ring 19, gland 20 and mold locking oil cylinder 5.

[0030] Rear mold plate 12 is an important component of injection molding machine mold installation, and rear mold plate 12 is usually made of high-strength steel material, which has sufficient rigidity and strength to withstand the mold locking force and injection pressure in the injection molding process. The four corners of rear mold plate 12 are respectively provided with first pull rod 1, second pull rod 2, third pull rod 3 and fourth pull rod 4, and these pull rods are uniformly distributed, which jointly bear the adjusting and supporting functions of rear mold plate 12. The center position of rear mold plate 12 is provided with mold locking oil cylinder 5 for providing mold locking force to ensure the smooth progress of the injection molding process.

[0031] The first pull rod 1, the second pull rod 2, the third pull rod 3 and the fourth pull rod 4 are made of high-strength steel and are precisely processed to ensure dimensional accuracy and straightness. The pull rod converts the rotary motion of the synchronous belt into linear motion along the rotation axis direction to drive the rear template 12 to move forward and backward.

[0032] The rear nut 17 is sleeved on the outer side of each pull rod, and the rear nut 17 is connected to the rear template 12 by a hinge connection. This hinge connection allows the rear nut 17 to rotate relative to the rear template 12 while maintaining the relative position of the rear template 12 and the rear nut 17 unchanged. The inner side of the rear nut 17 is processed with internal threads 18, which are engaged with the threads on the outer side of the pull rod, to convert the rotation of the rear nut 17 into linear motion of the rear template 12 as a whole. The outer side of the rear nut is also provided with a toothed structure engaged with the synchronous belt.

[0033] The drive motor 10 is the power source of the entire mold adjusting system, usually a servo motor or a stepper motor is selected to achieve precise position control and speed regulation. Servo motor can provide higher control accuracy and response speed, while stepper motor has cost advantage, according to the specific mold adjusting accuracy and speed requirement, select the appropriate motor type. The drive motor 10 is fixed on the side of the rear template 12 through the motor mounting seat 11, and is fixedly installed with the rear template 12 to move together.

[0034] The function of the motor mounting seat 11 is to fix the drive motor 10 and provide a platform for the installation of the movable tensioner 8. The motor mounting seat 11 can be made of cast iron or welded steel structure, which requires sufficient strength and rigidity to ensure the stability of the operation of the drive motor 10, and is not the main stressed component. Two tensioner sliding grooves are symmetrically arranged on the motor mounting seat 11, which are the first tensioner sliding groove 6 and the second tensioner sliding groove 7, respectively, for the installation of the movable tensioner 8.

[0035] The first synchronous belt 9 is the main transmission belt, which is connected with the output shaft of the drive motor 10 and the first pull rod 1 and the third pull rod 3. The output shaft of the drive motor 10 is provided with a synchronous belt pulley, and the first synchronous belt 9 passes through the synchronous belt pulley of the drive motor output shaft and is engaged with the outer wall of the rear nut 17 on the first pull rod 1 and the third pull rod 3, respectively, to form power transmission. The advantage of synchronous belt is high transmission accuracy, low noise and easy maintenance, which can ensure the synchronous adjustment of the rear template 12 on both sides.

[0036] The second synchronous belt 14 connects the first pull rod 1 and the second pull rod 2, and the third synchronous belt 15 connects the third pull rod 3 and the fourth pull rod 4. The two synchronous belts synchronize the rotation of the first pull rod 1 and the third pull rod 3 to the second pull rod 2 and the fourth pull rod 4, ensuring the synchronous movement of the four corners of the rear mold plate 12 and achieving overall parallel movement.

[0037] The first synchronous belt 9 and the second synchronous belt 14 are sleeved on the first pull rod 1, and are arranged on the rear nut 17 of the first pull rod 1 in an up-down distribution manner without interfering with each other. The first synchronous belt 9 and the third synchronous belt 15 are sleeved on the third pull rod 3, and are arranged on the rear nut 17 of the third pull rod 3 in an up-down distribution manner without interfering with each other.

[0038] The movable tensioner 8 is installed in the tensioner sliding groove of the motor mounting seat 11, and cooperates with the first synchronous belt 9 to adjust the tension of the first synchronous belt 9. The movable tensioner 8 adjusts the tension of the first synchronous belt 9 to ensure the reliability and efficiency of the synchronous belt transmission. By adjusting the position of the movable tensioner 8 in the tensioner sliding groove, the tension of the synchronous belt can be changed to prevent the synchronous belt from slipping or being too loose.

[0039] The first tensioner sliding groove 6 and the second tensioner sliding groove 7 are respectively located between the output end of the drive motor 10 and the first pull rod 1, and between the output end of the drive motor 10 and the third pull rod 3, facilitating local tension adjustment of the first synchronous belt 9. The fixed position of the movable tensioner 8 is adjustable and can be fixed in the appropriate position of the tensioner sliding groove by means of bolts and the like.

[0040] The fixed tensioner 13 has two, which are installed on the second synchronous belt 14 and the third synchronous belt 15 near the side of the drive motor 10, and contact with the synchronous belt. The fixed tensioner 13 increases the wrap angle of the synchronous belt to ensure good meshing between the synchronous belt and the synchronous belt wheel, preventing tooth skipping and slipping. The position of the fixed tensioner 13 is fixed and does not need to be adjusted, simplifying the structure.

[0041] The rear nut 17 is engaged with the pull rod thread and converts the rotation of the synchronous belt into linear motion along the pull rod. The rear nut 17 engaged with the first pull rod 1 is provided with the first synchronous belt 9 and the second synchronous belt 14; the rear nut 17 engaged with the third pull rod 3 is provided with the first synchronous belt 9 and the third synchronous belt 15. This compact structure design effectively utilizes the space.

[0042] The rear nut 17 is usually made of wear-resistant material and is heat treated to improve its strength and wear resistance, and the surface roughness of the rear nut 17 is small to reduce the friction between the rear mold plate 12.

[0043] The friction ring 19 is placed at the lower end surface of the rear nut 17 and the cooperation position of the rear mold plate 12, and the upper end surface of the rear nut 17 and the cooperation position of the gland 20. The function of the friction ring 19 is to reduce the friction between the rear nut 17 and the rear mold plate 12 and the gland 20, reduce the rotation resistance, ensure the stability and smoothness of the rotation of the rear nut 17, and reduce the wear and prolong the service life. The friction ring 19 is usually made of wear-resistant and self-lubricating engineering plastic or metal material.

[0044] The gland 20 is installed with the upper end surface of the rear nut 17, which is used to limit the axial movement of the rear nut 17, ensure the stability of the position of the rear nut 17 during rotation, and improve the mold adjustment accuracy. The gland 20 is usually made of metal material, and is connected and fixed between the rear mold plate 12 through the limiting rod 16.

[0045] Example two:

[0046] The structure of this embodiment is basically the same as that of example one, and the dynamic movement process of the structure is specifically described.

[0047] As shown in Figures 1 to 4 A synchronous belt mold adjusting structure of an injection molding machine, comprising a rear mold plate 12 and a driving motor 10, the four corners of the rear mold plate 12 are respectively provided with a first pull rod 1, a second pull rod 2, a third pull rod 3 and a fourth pull rod 4, and the four pull rods are provided with synchronous belt transmission connection between the driving motor 10.

[0048] The synchronous belt mold adjusting structure mainly consists of the following components: rear mold plate 12, driving motor 10, motor mounting seat 11, first pull rod 1, second pull rod 2, third pull rod 3, fourth pull rod 4, first synchronous belt 9, second synchronous belt 14, third synchronous belt 15, movable tensioning wheel 8, fixed tensioning wheel 13, rear nut 17, internal thread 18, friction ring 19, gland 20 and mold locking oil cylinder 5.

[0049] The rear mold plate 12 is an important component of the mold installation of the injection molding machine, and the rear mold plate 12 is usually made of high-strength steel material, which has enough rigidity and strength to withstand the clamping force and injection pressure in the injection molding process. The four corners of the rear mold plate 12 are respectively provided with the first pull rod 1, the second pull rod 2, the third pull rod 3 and the fourth pull rod 4, which are uniformly distributed and jointly bear the adjusting and supporting functions of the rear mold plate 12. The center position of the rear mold plate 12 is provided with the mold locking oil cylinder 5 for providing clamping force to ensure the smooth progress of the injection molding process.

[0050] The first pull rod 1, the second pull rod 2, the third pull rod 3 and the fourth pull rod 4 are made of high-strength steel and are precisely processed to ensure dimensional accuracy and straightness. The pull rod converts the rotary motion of the synchronous belt into linear motion along the rotation axis direction to drive the rear template 12 to move forward and backward.

[0051] The rear nut 17 is sleeved on the outer side of each pull rod, and the rear nut 17 is connected to the rear template 12 by a hinge connection. This hinge connection allows the rear nut 17 to rotate relative to the rear template 12 while maintaining the relative position of the rear template 12 and the rear nut 17 unchanged. The inner side of the rear nut 17 is processed with internal threads 18, which are engaged with the threads on the outer side of the pull rod, to convert the rotation of the rear nut 17 into linear motion of the rear template 12 as a whole. The outer side of the rear nut is also provided with a toothed structure engaged with the synchronous belt.

[0052] The drive motor 10 is the power source of the entire mold adjusting system, and is usually selected from a servo motor or a stepper motor to achieve precise position control and speed regulation. The servo motor can provide higher control accuracy and response speed, while the stepper motor has cost advantage. According to the specific mold adjusting accuracy and speed requirement, the appropriate motor type is selected. The drive motor 10 is fixed on the side of the rear template 12 through the motor mounting seat 11, and is fixedly installed with the rear template 12 to move together.

[0053] The function of the motor mounting seat 11 is to fix the drive motor 10 and provide a platform for the installation of the movable tensioning wheel 8. The motor mounting seat 11 can be made of cast iron or welded steel structure, which requires sufficient strength and rigidity to ensure the stability of the operation of the drive motor 10, and is not the main stressed component. Two tensioning wheel sliding grooves are symmetrically arranged on the motor mounting seat 11, which are the first tensioning wheel sliding groove 6 and the second tensioning wheel sliding groove 7, respectively, for the installation of the movable tensioning wheel 8.

[0054] The first synchronous belt 9 is connected with the output shaft of the drive motor 10 and the first pull rod 1 and the third pull rod 3 as the main transmission belt. The output shaft of the drive motor 10 is provided with a synchronous belt pulley, and the first synchronous belt 9 passes through the synchronous belt pulley of the drive motor output shaft and is engaged with the outer wall of the rear nut 17 on the first pull rod 1 and the third pull rod 3, respectively, to form power transmission. The advantage of synchronous belt is high transmission accuracy, low noise and easy maintenance, which can ensure the synchronous adjustment of the two sides of the rear template 12.

[0055] The second synchronous belt 14 connects the first pull rod 1 and the second pull rod 2, and the third synchronous belt 15 connects the third pull rod 3 and the fourth pull rod 4. The two synchronous belts synchronize the rotation of the first pull rod 1 and the third pull rod 3 to the second pull rod 2 and the fourth pull rod 4, ensuring the synchronous movement of the four corners of the rear mold plate 12 and achieving overall parallel movement.

[0056] The first synchronous belt 9 and the second synchronous belt 14 are sleeved on the first pull rod 1, and are distributed above and below the rear nut 17 of the first pull rod 1 without interfering with each other. The first synchronous belt 9 and the third synchronous belt 15 are sleeved on the third pull rod 3, and are distributed above and below the rear nut 17 of the third pull rod 3 without interfering with each other.

[0057] The movable tensioner 8 is installed in the tensioner sliding groove of the motor mounting seat 11, and cooperates with the first synchronous belt 9 to adjust the tension of the first synchronous belt 9. The movable tensioner 8 adjusts the tension of the first synchronous belt 9 to ensure the reliability and efficiency of synchronous belt transmission. By adjusting the position of the movable tensioner 8 in the tensioner sliding groove, the tension of the synchronous belt can be changed to prevent slipping or looseness of the synchronous belt.

[0058] The first tensioner sliding groove 6 and the second tensioner sliding groove 7 are respectively located between the output end of the drive motor 10 and the first pull rod 1, and between the output end of the drive motor 10 and the third pull rod 3, facilitating local tension adjustment of the first synchronous belt 9. The fixed position of the movable tensioner 8 can be adjusted and fixed in the appropriate position of the tensioner sliding groove by means of bolts and the like.

[0059] The fixed tensioner 13 has two, which are respectively installed on the second synchronous belt 14 and the third synchronous belt 15 near the side of the drive motor 10, and contact with the synchronous belt. The fixed tensioner 13 increases the wrap angle of the synchronous belt to ensure good meshing between the synchronous belt and the synchronous belt wheel, preventing tooth skipping and slipping. The position of the fixed tensioner 13 is fixed and does not need to be adjusted, simplifying the structure.

[0060] The rear nut 17 is engaged with the pull rod thread and converts the rotation of the synchronous belt into linear motion along the pull rod. The rear nut 17 engaged with the first pull rod 1 is simultaneously provided with the first synchronous belt 9 and the second synchronous belt 14, and the rear nut 17 engaged with the third pull rod 3 is simultaneously provided with the first synchronous belt 9 and the third synchronous belt 15. This compact structure design effectively utilizes the space.

[0061] The rear nut 17 is usually made of wear-resistant material and is heat treated to improve its strength and wear resistance. The surface roughness of the rear nut 17 is small to reduce the friction with the rear mold plate 12.

[0062] The friction ring 19 is arranged at the lower end surface of the rear nut 17 and the rear mold plate 12 and at the upper end surface of the rear nut 17 and the gland 20. The friction ring 19 reduces the friction between the rear nut 17 and the rear mold plate 12 and the gland 20, reduces the rotation resistance, ensures the stability and smoothness of the rotation of the rear nut 17, reduces the wear and prolongs the service life. The friction ring 19 is usually made of wear-resistant and self-lubricating engineering plastic or metal material.

[0063] The gland 20 is arranged at the upper end surface of the rear nut 17 and is used to limit the axial movement of the rear nut 17, ensure the stability of the position of the rear nut 17 during rotation and improve the mold adjusting accuracy. The gland 20 is usually made of metal material and is connected and fixed between the rear mold plate 12 and the limiting rod 16.

[0064] When the driving motor 10 is started, the output shaft drives the first synchronous belt 9 to rotate, and the first synchronous belt 9 drives the rear nut 17 engaged with the first pull rod 1 and the third pull rod 3 to rotate. Since the rear nut 17 is threadedly engaged with the pull rods, the rotation of the rear nut 17 is converted into the linear motion of the first pull rod 1 and the third pull rod 3, thereby driving the rear mold plate 12 to move along the pull rods.

[0065] Meanwhile, the movement of the first synchronous belt 9 is also transmitted to the rear nut 17 on the second pull rod 2 and the fourth pull rod 4 through the second synchronous belt 14 and the third synchronous belt 15, thereby driving the second pull rod 2 and the fourth pull rod 4 to move synchronously. Since the four pull rods are hinged to the rear mold plate 12 through the rear nut 17 and the synchronous belt transmission ensures the synchronous movement of the four pull rods, the rear mold plate 12 can move in parallel during mold adjusting, thereby realizing accurate mold position adjusting.

[0066] By adjusting the rotation direction and rotation amount of the driving motor 10, the front and back movement of the rear mold plate 12 can be realized, thereby adjusting the closed position of the mold. The movable tensioning wheel 8 can adjust the tensioning force of the first synchronous belt 9 according to the actual use, thereby ensuring the reliability and accuracy of the synchronous belt transmission. The fixed tensioning wheel 13 ensures the good engagement of the second synchronous belt 14 and the third synchronous belt 15 with the synchronous belt wheel. The rotation direction of the driving motor 10 is consistent with the rotation direction of the rear nut 17.

[0067] The synchronous belt mold adjusting structure of the embodiment has the following advantages:

[0068] High synchronization accuracy: synchronous belt transmission is adopted to ensure the synchronous movement of the four corners of the rear mold plate 12, realize high-precision mold position adjustment, and improve the quality and precision of the injection molded products.

[0069] Compact structure: the synchronous belt is used to connect the driving motor and the four pull rods, the structure is simple and compact, the cost is low, the space occupation is small, and the installation and maintenance are easy.

[0070] Smooth operation: synchronous belt transmission has low noise and small vibration, runs smoothly and reliably, and improves the service life of the equipment.

[0071] Convenient adjustment: through the control of the driving motor and the movable tensioning wheel adjustment, the mold adjustment operation is convenient and fast, and the production efficiency is improved.

Claims

1. A synchronous belt mold adjustment structure of an injection molding machine, characterized by comprising: The utility model provides a rear template (12) and drive motor (10), the rear template (12) four corners are equipped with one pull rod (1) and second pull rod (2) and third pull rod (3) and fourth pull rod (4) respectively, and the four pull rods are equipped with synchronous belt transmission connection between drive motor (10).

2. The synchronous belt mold adjusting structure of an injection molding machine according to claim 1, wherein The drive motor (10) and the rear template (12) are connected by a motor mounting seat (11), and the output part of the drive motor (10) is connected by a first synchronous belt (9) between the first pull rod (1) and the third pull rod (3).

3. The synchronous belt mold adjusting structure of claim 2, wherein, The motor mounting seat (11) is symmetrically provided with a tension pulley sliding groove, and a movable tension pulley (8) parallel to the pull rod is arranged in the tension pulley sliding groove, and the movable tension pulley (8) is matched with the first synchronous belt (9).

4. The synchronous belt mold adjusting structure of claim 3, wherein, On the motor mounting seat (11), between the output end of the drive motor (10) and the first pull rod (1), a first tension pulley sliding groove (6) is arranged, and the fixed position of the movable tension pulley (8) on the first tension pulley sliding groove (6) is adjustable. On the motor mounting seat (11), between the output end of the drive motor (10) and the third pull rod (3), a second tension pulley sliding groove (7) is arranged, and the fixed position of the movable tension pulley (8) on the second tension pulley sliding groove (7) is adjustable.

5. The synchronous belt mold adjusting structure of an injection molding machine according to claim 1 or 2 or 3 or 4, characterized in that, The first pull rod (1) and the second pull rod (2) are connected by a second synchronous belt (14), and a fixed tension pulley (13) is arranged on the side close to the drive motor (10) and in contact with the second synchronous belt (14).

6. The synchronous belt profiling structure of an injection molding machine according to claim 1 or 2 or 3 or 4, characterized in that, The third pull rod (3) and the fourth pull rod (4) are connected by a third synchronous belt (15), and a fixed tension pulley (13) is arranged on the side close to the drive motor (10) and in contact with the third synchronous belt (15).

7. The synchronous belt mold adjusting structure of claim 1, wherein, Each of the four pull rods is sleeved with a rear nut (17), the rear nut (17) is hinged to the rear template (12), the rear nut (17) is engaged with the inner thread (18) at the matched position with the pull rod, and the synchronous belt is connected with the rear nut (17).

8. The synchronous belt mold adjusting structure of claim 7, wherein, The rear nut (17) engaged with the first pull rod (1) is matched with the first synchronous belt (9) and the second synchronous belt (14); The rear nut (17) engaged with the third pull rod (3) is matched with the first synchronous belt (9) and the third synchronous belt (15).

9. The synchronous belt mold adjusting structure of claim 7, wherein, The lower end surface of the rear nut (17) is matched with the friction ring (19) at the matched position with the rear template (12), the upper end surface of the rear nut (17) is matched with the gland (20), and the friction ring (19) is arranged between the upper end surface of the rear nut (17) and the gland (20).

10. The synchronous belt sizing structure of an injection molding machine according to claim 1 or 2 or 3 or 4 or 7 or 8 or 9, characterized in that, The center position of the rear template (12) is provided with a mold locking oil cylinder (5).

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