TWM583800U - Mold locking device for outward-toggle type injection molding machine - Google Patents

Abstract

The present invention relates to a clamping device for an external curved injection molding machine, which is provided with a tie rod fixing seat, a linkage seat, a movable mold base and a fixed mold base, and is disposed between the fixed seat and the movable mold base. a toggle connecting rod set, wherein the fixed seat is provided with a motor unit, and a hollow rotating shaft seat and a ball screw sleeve are respectively fixed on the fixing seat and the connecting base, and the hollow rotating shaft seat and the ball screw sleeve are sleeved on the ball screw Thereby, when the motor unit drives the ball screw to rotate and drives the ball screw sleeve to move, the displacement seat is displaced to drive the outer curved elbow link group to stretch or polymerize, thereby completing the injection molding machine to close the mold, mold clamping or The working schedule of the mold opening.

Description

Clamping device for external curved injection molding machine

The present invention relates to a clamping device, especially a clamping device provided in an external curved injection molding machine, and can reduce the load of the motor when the clamping is performed.

According to the injection molding machine, after melting the thermoplastic material, the molten plastic is filled into the mold by applying high pressure to form the desired product. Injection molding machines typically include injection, clamping, electrical control, lubrication, heating and cooling, and monitoring units. Wherein, the clamping device is a mechanism for providing mold closing or opening, clamping and ejection of the product, especially after the mold is closed, during the injection and holding, the clamping device must have a proper clamping force, when the clamping is performed When the force is insufficient or the distribution is uneven, the molten plastic pressure will generate a reaction force on the mold, causing the mold to be opened to create a gap to produce a defective product, and when the clamping force is too large, the mold clamping large column will be bent to make the mold base. The deformation, therefore, the clamping force of the clamping device is an important key to affect the injection of the finished product.

The conventional clamping device is mainly provided with a hydraulic cylinder in the fixed mold base, and four clamping mold large columns are inserted between the fixed mold base and the movable mold base, and four hydraulic cylinders are arranged in the fixed mold base to control the clamping mode. The large column makes the movable mold base reciprocate, but the above structure requires a lot of hydraulic cylinders, and it is necessary to ensure that the clamping force of the four hydraulic cylinders acts on the mold evenly, otherwise the defective products will still be generated, and even the clamping mold will be large. The column is deformed or broken.

In order to solve the above-mentioned deficiencies, the applicant of the present application filed and approved the patent No. 6520766 in the United States, which discloses a "clamping device for the injection machine", which is mainly provided with a retaining plate, a movable seat and a movable body in the tie rod group. a mold base, and a toggle link set is arranged between the retainer and the movable mold base, and a screw sleeve is arranged in the joint seat, and a ball screw fixed at one end to the movable mold base is screwed in the screw sleeve to make the screw The sleeve can be driven by the power source of the linkage seat to rotate and displace on the ball screw, thereby driving the linkage seat to interlock the toggle link group to move the movable die holder to complete the process of closing, clamping or opening the mold. However, in the above case, the screw sleeve needs to be rotated on the ball screw. Therefore, it is obvious that the screw bushing is inconvenient, the hollow ball screw structure is not strong, and the motor load is heavy.

In view of the fact that the conventional clamping device still has the inconvenience of screwing oil injection, the structural strength of the hollow ball screw is not good, and the load on the motor is heavy, etc., it is obvious that there is a lack of improvement.

Therefore, the purpose of the present invention is to drive the ball screw to rotate through the motor unit, so that the ball screw sleeve sleeved on the ball screw and fixed to the linkage seat drives the linkage seat to move, thereby controlling the outer curved elbow link group to perform the injection molding machine. Close the mold, mold clamping or mold opening stroke.

In order to achieve the above objective, the present invention provides a clamping device for an external curved injection molding machine, which is disposed between the fixing base of the injection molding machine and the fixed mold base by four tie rods, and is located at the fixed seat and fixed. The mold base and the movable mold base are sequentially arranged between the mold bases, and the first link base and the second link base are respectively disposed on the fixed seat and the movable mold base, and the first link seat, the linkage seat and the first link seat An outer curved elbow connecting rod set is disposed between the two connecting rods, wherein the fixed seat is provided with a motor unit, and a driving gear is sleeved on the driving shaft of the motor unit, and is fixed in the fixing seat and the connecting base respectively. a hollow rotating shaft seat and a ball screw sleeve, and the hollow rotating shaft seat and the ball screw sleeve are sleeved on a ball screw, and a driven gear is arranged at the end of the ball screw adjacent to the hollow rotating shaft seat, and is driven by the driving gear and the driven gear A driving belt is arranged between the moving gears.

Based on the above, when the motor unit drives the driving gear to rotate, the driving belt interlocks the driven gear to rotate the ball screw, so that the ball screw rotates and drives the ball screw sleeve to move, so that the linkage seat is displaced to drive the outer curved elbow connecting rod group. Stretching or polymerizing, and thereby completing the operation of the injection molding machine to close the mold, mold clamping or mold opening.

In order to make the technical content of this creative purpose more complete, please refer to the following details, and please refer to the drawings and drawings.

First, as shown in Figures 1 and 2, the injection molding machine 1 of the present invention is placed between the fixed seat 11 and the fixed die holder 12 by a set of four tie bars 10, which are located at the fixed seat 11 and the fixed die holder 12. The linkage seat 13 and the movable mold base 14 are disposed in sequence, and the first link base 111 and the second link base 141 are respectively disposed on the fixed base 11 and the movable mold base 14, and the movable mold base 14 is provided with a top. The pin device 16 is disposed between the first link base 111, the linkage base 13 and the second link base 141, wherein the outer toggle link set 15 includes a first link 151. a second link 152 and a third link 153, wherein one ends of the first link 151, the second link 152 and the third link 153 are respectively axially connected to the first link base 111, the linkage base 13 and The second link base 141 is configured such that the other ends of the first link 151 are respectively axially coupled to the second link 152 and the third link 153 with different axial centers. A motor unit 17 is disposed on the side of the fixed base 11 (refer to FIG. 3), and a driving gear 172 is sleeved on the driving shaft 171 of the motor unit 17, and a hollow rotating shaft seat 112 is fixed on the fixing base 11 and The carrier 13 is fixed to a ball screw sleeve 18 having an oil hole 181, and the hollow shaft seat 112 and the ball screw sleeve 18 are sleeved on a ball screw 19, and the ball screw 19 is disposed at the end of the ball screw 19 adjacent to the hollow shaft seat 112. A driven gear 173 is disposed between the driving gear 172 and the driven gear 173.

Next, referring to FIG. 4, the following is an example in which the injection molding machine 1 performs a mold opening operation as an embodiment. The driving shaft 171 of the motor unit 17 drives the driving gear 172 to rotate to engage the driving gear. The driven belt 174 of the 172 is synchronously driven to rotate the driven gear 173 that is engaged with the driving belt 174. When the driven gear 173 rotates, the ball screw 19 is driven to rotate, so that the ball screw sleeve 18 screwed to the ball screw 19 is displaced. The movable base 13 is moved on the tie rod 10 (as indicated by the arrow in FIG. 4), and when the linkage seat 13 is moved, please refer to FIG. 5 to pull the second link 152 fixed to the linkage seat 13 to be fixed. The third link 153 of the second link base 141 is moved to cause the outer curved link group 15 to be in a polymerized state (as shown in FIG. 6), and the movable die holder 14 is displaced to complete the operation of opening the mold 2. In addition, the rotation of the ball screw 19 by the motor unit 17 can also be used to displace the ball screw sleeve 18 and the linkage seat 13, and the outer toggle link group 15 can be stretched to complete the mold closing or mold clamping operation.

Thereby, by fixing the ball screw sleeve 18 to the linkage seat 13 to drive the ball screw 19 to rotate by the motor unit 17, the ball screw sleeve 18 is displaced, and the linkage seat 13 is synchronized with the outer toggle link group 15. Actuated, the load of the motor unit 17 can be reduced, and the oil hole 181 can be directly disposed on the ball screw sleeve 18 without the need for a separate oil hole in the ball screw 19, thereby improving the structural strength of the ball screw 19 and simplifying the maintenance procedure. The work efficiency of the injection molding machine 1 is improved.

However, the above descriptions are merely preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Any changes and modifications that are not departing from the spirit of the present invention are covered by the scope of the present invention.

In summary, this creation has indeed broken through the tradition and has improved and innovative creation content and can be specifically implemented. It should meet the statutory requirements of the new patent, and file a patent application according to law, and invite the examination committee of the bureau to grant legal patent rights. Creation, to the sense of virtue.

This creation

1‧‧‧Injection molding machine

10‧‧‧ tied

11‧‧‧ Fixed seat

111‧‧‧First connecting rod seat

112‧‧‧ hollow shaft seat

12‧‧‧Fixed base

13‧‧‧Liandong

14‧‧‧ movable mold base

141‧‧‧Second link

15‧‧‧Outer elbow link set

151‧‧‧first link

152‧‧‧second link

153‧‧‧ Third Link

16‧‧‧Picking device

17‧‧‧Motor unit

171‧‧‧ drive shaft

172‧‧‧Drive gear

173‧‧‧ driven gear

174‧‧‧ drive belt

18‧‧‧Rolling screw sleeve

181‧‧‧ oil hole

19‧‧‧Ball screw

2‧‧‧Mold

Figure 1 is a top view of the present injection machine.  Figure 2 is a front view of the present injection machine.  Figure 3 is a left side view of the present injection machine.  Figures 4 to 6 are schematic diagrams of the operation of this creation.  

Claims (5)

The clamping device of the external curved injection molding machine is arranged between the fixing base of the injection molding machine and the fixed mold base by four tie rods, and is arranged between the fixed seat and the fixed mold base. a movable base and a movable mold base, wherein the fixed base and the movable mold base are respectively provided with a first link seat and a second link base, and the first link base, the linkage base and the second connection An outer curved elbow link set is disposed between the rod bases, wherein the fixed seat is provided with a motor unit, and a driving gear is sleeved on the driving shaft of the motor unit, and the fixed seat and the connecting seat are respectively fixed a hollow rotating shaft seat and a ball screw sleeve are arranged, and the hollow rotating shaft seat and the ball screw sleeve are sleeved on a ball screw, and a driven gear is disposed at an end of the ball screw adjacent to the hollow rotating shaft seat, and A driving belt is disposed between the driving gear and the driven gear. The mold clamping device of the curved injection molding machine according to claim 1, wherein the movable mold base is provided with a pin pushing device. The mold clamping device of the curved injection molding machine according to claim 1, wherein the motor unit is disposed beside the fixing seat. The mold clamping device of the curved injection molding machine according to claim 1, wherein the ball screw sleeve is provided with an oil hole. The mold clamping device of the curved injection molding machine according to claim 1, wherein the outer toggle link set comprises a first link, a second link and a third link, the first connection One end of the rod, the second connecting rod and the third connecting rod are respectively axially connected to the first connecting rod seat, the connecting rod seat and the second connecting rod seat, and the other ends of the first connecting rod are different axes The core is respectively coupled to the second link and the third link.