Thermal forming work station with pull-assisting head

Abstract

The utility model relates to a thermal forming workstation with a pull-assisting head. The thermal forming work station with the pull assisting head comprises a stand column, an upper transmission seat, a lower transmission seat, an upper die seat, a lower die seat, an upper driving motor, a lower driving motor, an upper transmission assembly and a lower transmission assembly. The device is characterized in that a pull assisting head transmission motor is installed on the upper transmission seat, a first synchronous belt wheel is connected to an output shaft of the pull assisting head transmission motor and is in transmission connection with a second synchronous belt wheel through a first synchronous belt, a rotatable spline housing is installed on the upper transmission seat, and the second synchronous belt wheel is connected to the spline housing; a spline shaft is arranged in the spline sleeve in a matched and penetrating mode, a rotatable third synchronous belt wheel is installed on the upper die base, the lower end of the spline shaft is connected with the third synchronous belt wheel, and the third synchronous belt wheel is in transmission connection with a fourth synchronous belt wheel through a second synchronous belt. According to the thermal forming workstation with the pull-assisting head, the weight of the upper die holder can be reduced, and meanwhile, the stability of the pull-assisting head transmission motor is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a press, concretely relates to a press for producing plastic products. BACKGROUND

[0002] Various plastic products are generally formed through a thermoforming workstation, and then cut out through a cutting device. The forming device and the cutting device generally have an upper die holder and a lower die holder. The upper die holder and the lower die holder of the forming device are provided with a forming die. The forming die forms a finished product through the relative movement of the upper die holder and the lower die holder. Some plastic products have a relatively deep depth, such as disposable plastic bowls, disposable plastic cups, etc. These plastic products are pressed together through the forming die (to form a closed die cavity), and then need to be blown into the die cavity to be formed through air pressure. However, the air pressure will cause the bottom of the plastic product to be excessively stretched and become very thin, affecting the product quality. In order to solve this problem, the thermoforming workstation generally also installs a pulling head on the upper die holder. When the forming die is closed, the pulling head is driven downward by another motor to press into the lower die, so as to form a plastic product blank. Since the pulling head is in contact and cold, it can locally shape the hot blank of the plastic product, so as to ensure that the bottom of the plastic product maintains the same thickness during the subsequent air pressure forming process. However, the motor driving the pulling head to move is installed on the upper die holder. This not only increases the weight of the upper die holder and improves the load of the motor driving the upper die holder to move up and down, but also affects the motor driving the pulling head to move due to the frequent up-and-down movement of the upper die holder, thereby affecting the service life of the thermoforming workstation. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model innovatively provides a thermoforming workstation with a pulling head, which has a more reasonable structure.

[0004] The hot forming workstation with the puller head comprises a column, an upper transmission seat, a lower transmission seat, an upper die seat, a lower die seat, an upper driving motor, a lower driving motor, an upper transmission assembly and a lower transmission assembly, the upper end of the column is installed on the upper transmission seat, the lower end of the column is installed on the lower transmission seat, the upper die seat and the lower die seat are movably arranged on the column, the upper driving motor is installed on the upper transmission seat and is in transmission connection with the upper die seat through the upper transmission assembly, and the lower driving motor is installed on the lower transmission seat and is in transmission connection with the lower die seat through the lower transmission assembly, characterized in that a puller head transmission motor is installed on the upper transmission seat, a first synchronous pulley is connected to the output shaft of the puller head transmission motor, the first synchronous pulley is in transmission connection with a second synchronous pulley through a first synchronous belt, a rotatable spline sleeve is installed on the upper transmission seat, the second synchronous pulley is connected to the spline sleeve, a spline shaft is matched and arranged in the spline sleeve, a rotatable third synchronous pulley is installed on the upper die seat, the lower end of the spline shaft is connected to the third synchronous pulley, the third synchronous pulley is in transmission connection with a fourth synchronous pulley through a second synchronous belt, a rotatable screw sleeve is installed on the upper die seat, the fourth synchronous pulley is connected to the screw sleeve, the screw sleeve is in threaded connection with a lead screw, and the lead screw is used for being connected with the puller head C.

[0005] A rotatable adjusting screw sleeve is installed on the upper transmission seat, the upper end of the column is in threaded connection in the adjusting screw sleeve, a sprocket is connected to the adjusting screw sleeve, all the sprockets corresponding to the columns are in transmission connection through a chain, and the chain is in transmission connection with an adjusting motor.

[0006] A first air cylinder is installed on the upper transmission seat, and the telescopic rod of the first air cylinder is in abutment against the upper end of the column.

[0007] A second air cylinder is installed on the upper transmission seat, and the telescopic rod of the second air cylinder is connected with the upper die seat.

[0008] An upper die is installed on the upper die seat, and a lower die is installed on the lower die seat.

[0009] According to the hot forming workstation with the puller head, the puller head transmission motor is installed on the upper transmission seat, the puller head is driven to move up and down through the transmission structure, the weight of the upper die seat is reduced, and the stability of the puller head transmission motor is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a perspective view of the utility model;

[0011] Figure 2 It is a plan view of the utility model;

[0012] Figure 3 It is Figure 2 It is a sectional view along the direction of A-A.

[0013] Figure 4 For Figure 2 the sectional view along the direction of B-B;

[0014] Figure 5 For the transmission principle diagram of the puller driving motor driving the lead screw;

[0015] Figure 6 For Figure 2 the sectional view along the direction of C-C;

[0016] Figure 7 For the structure schematic diagram of the upper die, the lower die and the puller. DETAILED DESCRIPTION

[0017] As Figure 1 shown, the hot forming workstation with the puller includes a column 1, an upper transmission seat 3, a lower transmission seat 6, an upper die seat 2, a lower die seat 5, an upper driving motor 4, a lower driving motor 7, an upper transmission assembly 20 (including an upper transmission connecting rod, which is prior art) and a lower transmission assembly 50 (including a lower transmission connecting rod, which is prior art). The upper end of the column 1 is installed on the upper transmission seat 3, the lower end of the column 1 is installed on the lower transmission seat 6, the upper die seat 2 and the lower die seat 5 are movably arranged on the column 1, the upper driving motor 4 is installed on the upper transmission seat 3 and is in transmission connection with the upper die seat 2 through the upper transmission assembly 20, the lower driving motor 7 is installed on the lower transmission seat 6 and is in transmission connection with the lower die seat 5 through the lower transmission assembly 50, and the upper die seat 2 and the lower die seat 5 move up and down through the driving of the upper driving motor 4 and the lower driving motor 7, as Figure 7 shown, so that the upper die A installed on the upper die seat 2 and the lower die B installed on the lower die seat 5 realize die closing. These are prior art.

[0018] In order to solve the problems existing in the prior art, as Figures 2-5 shown, the utility model discloses a puller driving motor 8 is installed on the upper transmission seat 3, as Figure 3 shown, the output shaft of the puller driving motor 8 is connected with the first synchronous pulley 80, as Figure 5 shown, the first synchronous pulley 80 is in transmission connection with the second synchronous pulley 82 through the first synchronous belt 81, as Figure 3 shown, the upper transmission seat 3 is installed with the rotatable spline sleeve 83, the second synchronous pulley 82 is connected on the spline sleeve 83, and the spline shaft 84 is matched and arranged in the spline sleeve 83, as Figure 4 shown, the upper die seat 2 is installed with the rotatable third synchronous pulley 85, as Figure 5 shown, the lower end of the spline shaft 84 is connected with the third synchronous pulley 85, the third synchronous pulley 85 is in transmission connection with the fourth synchronous pulley 87 through the second synchronous belt 86, as Figure 4As shown, the upper die holder 2 is provided with a rotatable screw sleeve 88, the fourth synchronous pulley 87 is connected with the screw sleeve 88, the screw sleeve 88 is threadedly connected with the lead screw 9, and the lead screw 9 is used to be connected with the puller C.

[0019] The driving principle of the puller driving motor 8 is as follows: when the upper die A is combined with the lower die B, the puller driving motor 8 drives the second synchronous pulley 82 to rotate through the first synchronous pulley 80 and the first synchronous belt 81, the spline sleeve 83 rotates due to the installation of the second synchronous pulley 82 on the spline sleeve 83, the spline shaft 84 rotates due to the installation of the spline shaft 84 in the spline sleeve 83, the third synchronous pulley 85 is connected with the fourth synchronous pulley 87 due to the lower end of the spline shaft 84 being connected with the third synchronous pulley 85, the fourth synchronous pulley 87 is connected to rotate through the second synchronous belt 86, the screw sleeve 88 rotates due to the connection of the fourth synchronous pulley 87 with the screw sleeve 88, the lead screw 9 moves up and down due to the threaded connection of the screw sleeve 88 with the lead screw 9, and finally the puller C moves up and down with the lead screw 9; the spline shaft 84 moves up and down in the spline sleeve 8 due to the up-and-down movement of the upper die holder 2. Since the puller driving motor 8 is installed on the upper driving seat 3 instead of the upper die holder 2, the weight of the upper die holder 2 is not affected, the upper die holder 2 moves up and down with the lightest weight, and the stability of movement is improved; in addition, since the position of the upper driving seat 3 is fixed (except for adjustment), the puller driving motor 8 is always in a stable state and does not vibrate up and down, thereby ensuring the service life of the puller driving motor 8.

[0020] In order to adjust the up-and-down position of the upper die holder 2 to meet the molding of products with different thicknesses, the spline sleeve 88 is provided with a threaded hole 89, and the spline sleeve 88 is connected with the spline shaft 84. Figure 2 And Figure 6 As shown, the upper driving seat 3 is provided with a rotatable adjusting screw sleeve 13, the upper end of the column 1 is threadedly connected in the adjusting screw sleeve 13, the adjusting screw sleeve 13 is connected with the sprocket 12, all the sprockets 12 corresponding to the column 1 are drivingly connected through the chain 11, the chain 11 is drivingly connected with the adjusting motor 10. When the up-and-down position of the upper die holder 2 is to be adjusted, the adjusting motor 10 drives the chain 11 to rotate, the chain 11 drives all the sprockets 12 to synchronously rotate, the sprocket 12 drives the corresponding adjusting screw sleeve 13 to rotate, the upper driving seat 3 moves up and down due to the installation of the adjusting screw sleeve 13 on the driving seat 3, and the up-and-down position of the upper die holder 2 can be adjusted due to the connection of the upper die holder 2 with the upper driving assembly 20 and the upper driving seat 3.

[0021] In order to eliminate the thread gap between the adjusting sleeve 13 and the upper end of the column 1 and improve the mold closing accuracy, the present invention installs a first cylinder 19 on the upper transmission seat 3. The telescopic rod of the first cylinder 19 is pushed against the upper end of the column 1, that is, the upper transmission seat 3 is lifted upward relative to the column 1, which can eliminate the thread gap at the connection between the adjusting sleeve 13 and the column 1.

[0022] Finally, it is worth mentioning that, in order to buffer the force between the upper transmission seat 3 and the upper mold seat 2, such as Figure 4 As shown, this utility model has a second cylinder 18 installed on the upper transmission seat 3, and the telescopic rod of the second cylinder 18 is connected to the upper mold seat 2. The second cylinder 18 acts as a spring, which can effectively buffer the force between the upper transmission seat 3 and the upper mold seat 2, thereby improving the stability of the equipment operation.

Claims

1. A hot forming station with a puller, comprising a column (1), an upper transmission seat (3), a lower transmission seat (6), an upper die seat (2), a lower die seat (5), an upper drive motor (4), a lower drive motor (7), an upper transmission assembly (20) and a lower transmission assembly (50), the upper end of the column (1) is installed on the upper transmission seat (3), the lower end of the column (1) is installed on the lower transmission seat (6), the upper die seat (2) and the lower die seat (5) are movably arranged on the column (1), the upper drive motor (4) is installed on the upper transmission seat (3) and is in transmission connection with the upper die seat (2) through the upper transmission assembly (20), the lower drive motor (7) is installed on the lower transmission seat (6) and is in transmission connection with the lower die seat (5) through the lower transmission assembly (50); characterized in that: The upper transmission seat (3) is provided with a pulling head transmission motor (8), the output shaft of the pulling head transmission motor (8) is connected with a first synchronous pulley (80), the first synchronous pulley (80) is in transmission connection with a second synchronous pulley (82) through a first synchronous belt (81), a rotatable spline sleeve (83) is installed on the upper transmission seat (3), the second synchronous pulley (82) is connected on the spline sleeve (83), a spline shaft (84) is matched and arranged in the spline sleeve (83), a rotatable third synchronous pulley (85) is installed on the upper die seat (2), the lower end of the spline shaft (84) is connected with the third synchronous pulley (85), the third synchronous pulley (85) is in transmission connection with a fourth synchronous pulley (87) through a second synchronous belt (86), a rotatable screw sleeve (88) is installed on the upper die seat (2), the fourth synchronous pulley (87) is connected with the screw sleeve (88), the screw sleeve (88) is in threaded connection with a lead screw (9), and the lead screw (9) is used for being connected with a pulling head (C).

2. A thermoforming station with a helper puller according to claim 1, characterized in that: A rotatable adjusting screw sleeve (13) is installed on the upper transmission seat (3), the upper end of the column (1) is in threaded connection in the adjusting screw sleeve (13), a sprocket (12) is connected on the adjusting screw sleeve (13), the corresponding sprockets (12) of all columns (1) are in transmission connection through a chain (11), and the chain (11) is in transmission connection with an adjusting motor (10).

3. A thermoforming station with a helper puller according to claim 2, characterized in that: A first air cylinder (19) is installed on the upper transmission seat (3), and the telescopic rod of the first air cylinder (19) is arranged on the upper end of the column (1).

4. A thermoforming station with a helper puller according to claim 1, characterized in that: A second air cylinder (18) is installed on the upper transmission seat (3), and the telescopic rod of the second air cylinder (18) is connected with the upper die seat (2).

5. A thermoforming station with a helper puller according to claim 1, characterized in that: An upper die (A) is installed on the upper die seat (2), and a lower die (B) is installed on the lower die seat (5).

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