Injection molding machine brake mechanism

Abstract

The invention relates to a brake mechanism for an injection molding machine, comprising two parallel slide rails, a left brake block and a right brake block respectively slidably arranged on the two slide rails at both ends, two baffle rods arranged in parallel on the outsides of the left brake block and the right brake block, a connecting plate vertically arranged on one side of the left brake block, two connecting rods with one end arranged on one side of the connecting plate and the other end passing through the left brake block and connected with the right brake block, and a brake cylinder horizontally arranged on the other side of the connecting plate and connected to the left brake block at the output end and having a buffering function; the invention can drive the left brake block and the right brake block to move in both directions to achieve clamping or loosening by a brake cylinder, has the characteristics of simple structure, flexible operation, low production cost, etc., and the brake cylinder has a buffering function, which can not only improve the service life of the brake mechanism, but also reduce noise.

Description

Technical Field

[0001] The invention relates to the field of injection molding, in particular to a brake mechanism for an injection molding machine. Background Art

[0002] Injection molding machine is a commonly used plastic machine used to produce plastic products. During production, a molding mold is installed on the injection molding machine, and the plastic product is molded in the molding mold. A large molding pressure is required for molding the product, so the injection molding machine is basically equipped with a clamping device to withstand the molding pressure of the molding mold. Although there are many clamping devices on the market, such as a clamping mechanism of a two-plate injection molding machine disclosed in the prior art CN01242454.4, a brake device and an injection molding machine disclosed in the prior art 201821478031.8, and a booster cylinder with a brake mechanism disclosed in the prior patent application No. 2019207373881, the speed of the piston rod in the brake cylinder is uncontrollable during movement, resulting in a violent collision with the cylinder body during movement, which not only reduces the service life of the brake cylinder, but also generates noise, and also affects the service life of the entire brake mechanism. Summary of the invention

[0003] The purpose of the present invention is to provide a brake mechanism for an injection molding machine in order to overcome the deficiencies of the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a brake mechanism of an injection molding machine, comprising two parallel slide rails, a left brake block and a right brake block respectively slidably arranged on the two slide rails at both ends, two baffles arranged in parallel on the outside of the left brake block and the right brake block, a connecting plate vertically arranged on one side of the left brake block, two connecting rods with one end arranged on one side of the connecting plate and the other end passing through the left brake block and connected with the right brake block, and a brake oil cylinder horizontally arranged on the other side of the connecting plate; the brake oil cylinder comprises a cylinder sleeve, a front cover and a rear cover respectively connected to the two ends of the cylinder sleeve by threads, a piston rod respectively located in the cavities of the front cover, the cylinder sleeve and the rear cover and one end extending out of the front cover and connected with the left brake block, a guide sleeve sleeved on the piston rod and embedded in the front end of the front cover, a large-hole oil port, a sealing ring, and a small-hole oil port respectively arranged on the front cover and the rear cover and spaced from the outside to the inside; a sealing structure is arranged at the connection between the front cover and the rear cover and the cylinder sleeve, the connection between the guide sleeve and the front cover, and between the piston rod and the cylinder sleeve and the guide sleeve.

[0005] Preferably, the small oil ports on the front cover and the rear cover are both provided with throttle valves.

[0006] Preferably, the large-hole oil port and the small-hole oil port are placed vertically.

[0007] Preferably, the sealing structure is an O-ring.

[0008] Preferably, two O-rings are provided and are placed at intervals.

[0009] Preferably, the distance between the two baffle rods is the sum of the width of the left gate block and the right gate block and the stroke of the brake cylinder, and the distances from the two baffle rods to the left gate block and the right gate block are the same.

[0010] Preferably, the two connecting rods are symmetrically arranged on both sides of the piston rod.

[0011] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0012] 1. The present invention can realize clamping or loosening by driving the left brake block and the right brake block to move in both directions through a brake cylinder, and has the characteristics of simple structure, flexible operation, low production cost, etc.

[0013] 2. Compared with the existing ordinary oil cylinder, the brake oil cylinder in the present invention has additional sealing rings and small-hole oil ports on the front cover and the rear cover. No matter whether the piston rod is extended or retracted, when the end of the piston rod has not reached the sealing ring, oil is discharged through the large-hole oil port. When it reaches the sealing ring, oil is discharged through the small-hole oil port. The oil port changes from a large hole to a small hole, and the piston rod will produce a damping effect, thereby playing a buffering role, which can effectively prevent the piston rod from violently colliding with the cylinder body during movement, thereby increasing the service life of the brake oil cylinder, reducing noise, and at the same time increasing the service life of the entire brake mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0015] Attached Figure 1 A top view of the brake mechanism of the injection molding machine according to the present invention;

[0016] Attached Figure 2 It is a cross-sectional view of the brake cylinder in the present invention.

[0017] Among them: 1. Brake cylinder; 11. Rear cover; 12. Cylinder sleeve; 13. Front cover; 14. Large hole oil port; 15. Guide sleeve; 16. Piston rod; 17. Sealing ring; 18. Small hole oil port; 2. Connecting plate; 3. Connecting rod; 4. Left brake block; 5. Slide rail; 6. Right brake block; 7. Stop rod. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Attached Figure 1-2The brake mechanism of the injection molding machine described in the present invention comprises two parallel slide rails 5, a left brake block 4 and a right brake block 6 respectively slidably arranged on the two slide rails 5 at both ends, two baffle rods 7 arranged in parallel on the outside of the left brake block 4 and the right brake block 6, a connecting plate 2 vertically arranged on one side of the left brake block 4, two connecting rods 3 with one end arranged on one side of the connecting plate 2 and the other end passing through the left brake block 4 and connected to the right brake block 6, and a brake cylinder 1 horizontally arranged on the other side of the connecting plate 2; the brake cylinder 1 comprises a cylinder sleeve 12, a front cover 13 and a rear cover 11 respectively connected to the two ends of the cylinder sleeve 12 by threads, and a split The piston rod 16 is respectively located in the front cover 13, the cylinder sleeve 12 and the rear cover 11 cavity and one end of which extends out of the front cover 13 and is connected to the left brake block 4, the guide sleeve 15 is sleeved on the piston rod 16 and inserted into the front end of the front cover 13, and the large-hole oil port 14, the sealing ring 17, and the small-hole oil port 18 are respectively arranged on the front cover 13 and the rear cover 11 and are arranged in sequence from the outside to the inside; the connection between the front cover 13 and the rear cover 11 and the cylinder sleeve 12, the connection between the guide sleeve 15 and the front cover 13, and the piston rod 16 and the cylinder sleeve 12 and the guide sleeve 15 are all provided with sealing structures; when working, the two slide rails 5 and the two The root stopper rod 7 is rectangular and installed on the injection molding machine (specifically, it can be installed on the upper mold plate). The left brake block 4 and the right brake block 6 are respectively arranged on both sides of the brake rod. When clamping is required, the brake cylinder 1 first drives the left brake block 4 to slide to the right along the slide rail 5 through the piston rod 16 and get stuck with the left side of the brake rod. Since the brake cylinder 1 is movably arranged, the brake cylinder 1 will drive the connecting plate 2 and the connecting rod 3 to move to the left in turn under the drive of the reaction force, thereby driving the right brake block 6 to slide to the left along the slide rail 5 and get stuck with the right side of the brake rod to achieve mold locking; compared with the existing ordinary cylinders, the brake cylinder 1 A sealing ring 17 and a small-hole oil port 18 are added to the front cover 13 and the rear cover 11. Regardless of whether the piston rod 16 is extended or retracted, when the end of the piston rod 16 has not reached the sealing ring 17, oil is discharged through the large-hole oil port 14. When it reaches the sealing ring 17, oil is discharged from the small-hole oil port 18. The oil port changes from a large hole to a small hole, and the piston rod 16 will produce a damping effect, thereby playing a buffering role, which can effectively prevent the piston rod 16 from violently colliding with the cylinder body during movement, thereby increasing the service life of the brake cylinder 1, reducing noise, and at the same time increasing the service life of the entire brake mechanism.

[0020] Preferably, the small oil ports 18 on the front cover 13 and the rear cover 11 are both provided with throttle valves, so that the buffer state of the piston rod 16 can be manually adjusted, making the operation more convenient.

[0021] Preferably, the large-hole oil port 14 and the small-hole oil port 18 are placed vertically to play a staggered role, which can greatly reduce the length of the front cover 13 and the rear cover 11 without affecting the connection of the oil pipe.

[0022] Preferably, the sealing structure is an O-ring 17, which is inexpensive and easy to repair and replace.

[0023] Preferably, two O-rings 17 are provided and placed at intervals, which has a better sealing effect and prevents oil leakage.

[0024] Preferably, the spacing between the two baffle rods 7 is the sum of the width of the left gate block 4 and the right gate block 6 and the stroke of the brake cylinder 1, so that the movement range of the left gate block 4 and the right gate block 6 is just equal to the stroke of the brake cylinder 1, and the distances from the two baffle rods 7 to the left gate block 4 and the right gate block 6 are the same, so that the movement range of the left gate block 4 and the right gate block 6 is the same.

[0025] Preferably, the two connecting rods 3 are symmetrically arranged on both sides of the piston rod 16, so that the force is more evenly applied.

[0026] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A brake mechanism for an injection molding machine, characterized in that: It comprises two parallel slide rails, a left gate block and a right gate block respectively slidably arranged on the two slide rails at both ends, two baffles arranged in parallel on the outside of the left gate block and the right gate block, a connecting plate vertically arranged on one side of the left gate block, two connecting rods with one end arranged on one side of the connecting plate and the other end passing through the left gate block and connected with the right gate block, and a brake cylinder horizontally arranged on the other side of the connecting plate; the two slide rails and the two baffles are installed in a rectangular shape on the upper mold plate of the injection molding machine, the spacing between the two baffles is the sum of the width of the left gate block and the right gate block and the stroke of the brake cylinder, and the distances from the two baffles to the left gate block and the right gate block are the same; The brake cylinder includes a cylinder sleeve, a front cover and a rear cover respectively connected to the two ends of the cylinder sleeve by threads, a piston rod respectively located in the cavities of the front cover, the cylinder sleeve and the rear cover and one end of which extends out of the front cover and is connected to the left brake block, a guide sleeve sleeved on the piston rod and embedded in the front end of the front cover, a large-hole oil port, a sealing ring, and a small-hole oil port respectively arranged on the front cover and the rear cover and spaced from the outside to the inside; sealing structures are provided at the connection between the front cover and the rear cover and the cylinder sleeve, at the connection between the guide sleeve and the front cover, and between the piston rod and the cylinder sleeve and the guide sleeve; the large-hole oil port and the small-hole oil port are placed vertically; and the two connecting rods are symmetrically arranged on both sides of the piston rod.

2. The brake mechanism for an injection molding machine according to claim 1, characterized in that: The small oil ports on the front cover and the rear cover are both provided with throttle valves.

3. The brake mechanism for an injection molding machine according to claim 1 or 2, characterized in that: The sealing structure is an O-type sealing ring.

4. The brake mechanism for an injection molding machine according to claim 3, characterized in that: The O-rings are provided with two and are placed at intervals.

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