Die assembly mechanism of full-servo thermoforming machine

Abstract

The utility model provides a mould closing mechanism of a full-servo thermoforming machine, which is provided with a mould table lifting mechanism, the mould table lifting mechanism is assembled on a base, a lower mould table is connected above the mould table lifting mechanism, a motor shaft is arranged in the base and used for being connected with the mould table lifting mechanism, and the motor shaft is driven by a servo motor. The end, connected with the die table lifting mechanism, of the motor shaft is in a D shape, accompanying air cylinders are arranged on the two sides of the lower portion of the lower die table, and auxiliary air cylinders are arranged on the two sides of the upper portion of the base. The lifting mechanism comprises a horizontally-arranged support, a first connecting piece and a second connecting assembly are connected below the support in series, namely the two ends of the first connecting piece are connected with the lower portion of the support and the second connecting assembly through ball bearings respectively, and a D-shaped hole is formed in the lower portion of the second connecting assembly and connected with a motor shaft. According to the utility model, the servo motor is adopted to drive the mold table lifting mechanism, the structural matching is optimized, and the air cylinder is configured, so that the action process is labor-saving, the production efficiency can be improved, and the vibration and noise generated by the mold during mold opening are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mold structures, in particular to a mold clamping mechanism of a full-servo thermoforming machine. Background Art

[0002] The existing die table lifting mechanism usually uses a hydraulic cylinder to push up the center of the bottom of the lower die, and uses the pipe uprights around the lower die to make the die run relatively smoothly. However, it is obvious that the hydraulic cylinder has a slow stroke and low efficiency. When opening the die, the die is likely to cause vibration and noise when it falls. In addition, the die table lifting mechanism has low stability in opening and closing the die due to the gap in the working environment during actual operation. Utility Model Content

[0003] The purpose of the utility model is to provide a full-servo thermoforming machine mold clamping mechanism in view of the existing technical status, which adopts a labor-saving structure driven by a servo motor, combined with multi-point stable support and the assistance of a cylinder, to improve production efficiency while reducing noise and vibration.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model is a mold clamping mechanism of a full-servo thermoforming machine, which is provided with a mold platform lifting mechanism, wherein the mold platform lifting mechanism is assembled on a base, the upper part of the mold platform lifting mechanism is connected to a lower mold platform, a motor shaft is arranged in the base for connecting the mold platform lifting mechanism, the motor shaft is driven by a servo motor, and the connection end between the motor shaft and the mold platform lifting mechanism is D-shaped, cylinders are arranged on both sides below the lower mold platform, and auxiliary cylinders are arranged on both sides above the base.

[0006] In the above scheme, the mold platform lifting mechanism includes a horizontally arranged bracket, and a first connecting member and a second connecting component are connected in series below the bracket, that is, the two ends of the first connecting member are respectively connected to the lower part of the bracket and the second connecting component by ball bearings, and a D-shaped hole is opened at the lower part of the second connecting component to connect to the motor shaft.

[0007] Furthermore, stabilization components are symmetrically connected on both sides of the bracket, and the stabilization components include an upper support and a lower support. The upper support is axially connected to a first limit group at the bottom, and the lower support is axially connected to a second limit group at the top, and the first limit group is axially connected to the second limit group. A third limit group is arranged between the second limit group and the bracket, and both ends of the third limit group are axially connected to the second limit group and the bracket respectively.

[0008] Furthermore, the lower part of the bracket has two parallel connecting heads, the upper end of the first connecting member is assembled between the two connecting heads, the second connecting assembly is composed of two parallel connecting members, and the lower end of the first connecting member is assembled between the two connecting members of the second connecting assembly.

[0009] Furthermore, the first limit group consists of two parallel limit blocks, the second limit group consists of three parallel limit blocks, and the limit blocks of the first limit group and the second limit group are arranged transversely alternately, and the third limit group consists of two parallel limit blocks.

[0010] Furthermore, the limiting block located in the center of the second limiting group is a triangular traction accessory, which is axially connected to the first limiting group, the lower support and the third limiting group respectively.

[0011] Furthermore, the bracket is in a cross shape, and the left and right ends of the bracket are respectively provided with transverse through holes axially connected to the third limit group, and the front and rear ends of the bracket are respectively provided with longitudinal through holes.

[0012] Furthermore, hollow positions are opened on both sides of the lower die table, and a ejector plate is arranged above the cylinder. When the cylinder is in the initial state, the ejector plate is located in the hollow position and is flush with the bottom of the lower die table. When the cylinder is pushed up, the ejector plate passes through the bottom of the lower die table.

[0013] The beneficial effects of the utility model are: it adopts a servo motor drive, combines the first connecting member and the second connecting member to form a crankshaft operation mode, and multiple sets of limit groups axially connected to each other can realize multi-point stable support on both sides of the bracket to ensure that the lower mold is evenly stressed during the lifting process, so that the servo motor drives the mold table lifting mechanism to move more labor-saving and faster; in addition, it is matched with a cylinder that runs with the mold table lifting mechanism. After the mold table lifting mechanism rises into place, the cylinder starts to support the mold, which can assist the lower mold table and the mold to move downward when opening the mold, reduce the vibration and noise of the mold, and increase the service life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram related to the utility model;

[0015] Figure 2 It is a cross-sectional view related to the utility model;

[0016] Figure 3 It is a structural schematic diagram of the middle mold platform lifting mechanism of the utility model;

[0017] Figure 4 It is a schematic diagram of the connection structure between the motor shaft and the second connection component in the utility model. DETAILED DESCRIPTION

[0018] The utility model will be further described in detail below with reference to the accompanying drawings.

[0019] Reference Figures 1 to 3As shown, a mold clamping mechanism of a full-servo thermoforming machine has a mold table lifting mechanism, which is assembled on a base 1. The mold table lifting mechanism is connected to a lower mold table 2 above. A motor shaft 11 is arranged in the base 1 for connecting the mold table lifting mechanism. The motor shaft 11 is driven by a servo motor, and the connection end between the motor shaft 11 and the mold table lifting mechanism is D-shaped. A bearing seat is arranged between the motor shaft 11 and the base 1. Specifically, the mold platform lifting mechanism includes a horizontally arranged bracket 5, and a first connecting member 50 and a second connecting component 56 are connected in series below the bracket 5, that is, the two ends of the first connecting member 50 are respectively connected to the lower part of the bracket 5 and the second connecting component 56 by ball bearings 58, and a D-shaped hole is provided at the lower part of the second connecting component 56 to be connected to the motor shaft 11. The D-shaped connection between the second connecting component 56 and the motor shaft 11 makes the servo motor transmission torque larger and more stable. Combined with the ball bearings 58 at both ends of the first connecting member 50, the lower end of the first connecting member 50 rotates with the second connecting component 56 during transmission, and the upper end of the first connecting member 50 pushes the mold platform lifting mechanism to reciprocate up and down, realizing a crankshaft-like motion, and its transmission is more labor-saving and efficient.

[0020] like Figure 4 As shown, the D-type connection is a connection structure with a D-shaped cross-section. Compared with the round shaft pin connection, the D-type connection has a planar contact that can generate greater friction, and the transmission torque is larger and more stable. The D-type connection is widely used in the prior art and will not be described in detail here.

[0021] The two sides of the bracket 5 are symmetrically connected with a stabilization component, which includes an upper support 51 and a lower support 52. The lower part of the upper support 51 is axially connected to a first limit group 511, and the upper part of the lower support 52 is axially connected to a second limit group 521. The first limit group 511 is axially connected to the second limit group 521. A third limit group 531 is arranged between the second limit group 521 and the bracket 5. The two ends of the third limit group 531 are axially connected to the second limit group 521 and the bracket 5. The stabilization component has five axial joints, which can fully disperse the force and ensure the stability of the bracket 5 during the lifting process.

[0022] The lower part of the bracket 5 has two parallel connecting heads, the upper end of the first connecting member 50 is assembled between the two connecting heads, the second connecting assembly 56 is composed of two parallel connecting members, and the lower end of the first connecting member 50 is assembled between the two connecting members of the second connecting assembly 56, so that the transmission structure is evenly stressed.

[0023] The first limit group 511 is composed of two parallel limit blocks, and the second limit group 521 is composed of three parallel limit blocks. The limit blocks of the first limit group 511 and the second limit group 521 are arranged transversely and staggered, so that the intersection of the two limit groups is coaxial and evenly stressed, thereby achieving uniform force transmission.

[0024] The limiting block in the middle of the second limiting group 521 is a triangular traction accessory 60, such as Figure 3 As shown, it is axially connected to the first limit group 511, the lower support 52 and the third limit group 531 respectively. Regardless of whether the angle formed between the first limit group 511 and the second limit group 521 is less than 180°, the triangular traction accessory 60 can transmit the force of the bracket 5.

[0025] The third limit group 531 is composed of two parallel limit blocks, that is, the two ends of the third limit group 531 respectively clamp the bracket 5 and the third-level traction accessory 60 to form an axial connection to achieve stable force transmission. When the bracket 5 is lowered to the lowest position, the third limit group 531 is in a vertical state, the first limit group 511 and the second limit group 521 are in a lying V shape and are directly above the third limit group 531. The third limit group 531 provides stable support for the upper structure through the triangular traction accessory 60.

[0026] The bracket 5 is in a cross shape, and the left and right ends of the bracket 5 are respectively provided with transverse through holes axially connected to the third limit group 531, and the front and rear ends of the bracket 5 are respectively provided with longitudinal through holes. According to the front and rear widths of the mold, pipe-positive columns can be selected to pass through the longitudinal through holes, so that the front and rear ends of the bracket 5 have pipe-positive structures during the lifting process.

[0027] Cylinders 3 are arranged on both sides below the lower die table 2. Hollow positions 20 are opened on both sides below the lower die table 2. Ejector plates 30 are arranged above the cylinders 3. When the cylinders 3 are in the initial state, the ejector plates 30 are located in the hollow positions 20 and are flush with the bottom of the lower die table 2. When the cylinders 3 are pushing upward, the ejector plates 30 pass through the bottom of the lower die table 2. That is, the cylinders 3 as a whole follow the lower die table 2 up and down. When the lower die table 2 rises to its place, the cylinders 3 move to make the ejector plates 30 rise and push to the bottom of the mold. When the mold is opened, the lower die table 2 moves downward, the mold falls, and the ejector plates 30 can catch the mold to reduce noise and vibration.

[0028] Auxiliary cylinders 4 are arranged on both sides above the base 1. The auxiliary cylinders 4 are activated when the lower die table 2 rises. After the lower die table 2 rises to its proper position, the auxiliary cylinders 4 support both sides of the lower die table 2 to stabilize its structure and facilitate the stability of the structure during the mold closing operation. When the lower die table 2 descends, the auxiliary cylinders 4 are reset.

[0029] The above content is a further detailed description of the utility model in combination with a specific preferred implementation method. The technical scope of the utility model is not limited to the contents of the specification. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A mold clamping mechanism of a full servo thermoforming machine, having a mold table lifting mechanism, characterized in that: The die table lifting mechanism is assembled on a base (1), the die table lifting mechanism is connected to a lower die table (2) above, a motor shaft (11) is arranged in the base (1) for connecting the die table lifting mechanism, the motor shaft (11) is driven by a servo motor, and the connection end between the motor shaft (11) and the die table lifting mechanism is D-shaped, cylinders (3) are arranged on both sides below the lower die table (2), and auxiliary cylinders (4) are arranged on both sides above the base (1).

2. The mold clamping mechanism of a full servo thermoforming machine according to claim 1, characterized in that: The die table lifting mechanism comprises a horizontally arranged bracket (5), a first connecting member (50) and a second connecting component (56) being serially connected below the bracket (5), that is, two ends of the first connecting member (50) are respectively connected to the lower part of the bracket (5) and the second connecting component (56) by means of ball bearings (58), and a D-shaped hole is provided at the lower part of the second connecting component (56) for connection to a motor shaft (11).

3. The mold clamping mechanism of a full servo thermoforming machine according to claim 2, characterized in that: The bracket (5) is symmetrically connected to a stabilization component on both sides, the stabilization component comprising an upper support (51) and a lower support (52), the upper support (51) being axially connected to a first limit group (511) at the bottom, the lower support (52) being axially connected to a second limit group (521) at the top, and the first limit group (511) and the second limit group (521) being axially connected, a third limit group (531) being arranged between the second limit group (521) and the bracket (5), and two ends of the third limit group (531) being axially connected to the second limit group (521) and the bracket (5) respectively.

4. The mold clamping mechanism of a full servo thermoforming machine according to claim 3, characterized in that: The bracket (5) has two parallel connecting heads at the bottom, the upper end of the first connecting member (50) is assembled between the two connecting heads, the second connecting assembly (56) is composed of two parallel connecting members, and the lower end of the first connecting member (50) is assembled between the two connecting members of the second connecting assembly (56).

5. The mold clamping mechanism of a full servo thermoforming machine according to claim 3, characterized in that: The first limit group (511) consists of two limit blocks arranged in parallel, the second limit group (521) consists of three limit blocks arranged in parallel, and the limit blocks of the first limit group (511) and the second limit group (521) are arranged in a transversely staggered manner, and the third limit group (531) consists of two limit blocks arranged in parallel.

6. The mold clamping mechanism of a full servo thermoforming machine according to claim 3, characterized in that: The limiting block located in the center of the second limiting group (521) is a triangular traction accessory (60), which is axially connected to the first limiting group (511), the lower support (52) and the third limiting group (531) respectively.

7. The mold clamping mechanism of a full servo thermoforming machine according to claim 3, characterized in that: The bracket (5) is in a cross shape, and the left and right ends of the bracket (5) are respectively provided with transverse through holes axially connected to the third limiter group (531), and the front and rear ends of the bracket (5) are respectively provided with longitudinal through holes.

8. A mold clamping mechanism for a full servo thermoforming machine according to any one of claims 1 to 5, characterized in that: Hollow positions (20) are provided on both sides below the lower die table (2), and a top material plate (30) is arranged above the cylinder (3). When the cylinder (3) is in an initial state, the top material plate (30) is located in the hollow position (20) and is flush with the bottom of the lower die table (2). When the cylinder (3) is in an upward position, the top material plate (30) passes through the bottom of the lower die table (2).

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