Bridge type stretching device of multi-station plastic thermal forming machine

Abstract

The utility model provides a bridge type stretching device of a multi-station plastic thermal forming machine, which comprises a rack, a fixing frame and an installation structure used for being connected with a lower die, the installation structure is arranged on the rack, a supporting shaft is fixedly connected on the rack, a conduction structure is arranged on the fixing frame, and the conduction structure is connected with the lower die. The supporting shaft is in threaded connection with an adjusting sleeve, the adjusting sleeve is rotationally connected to a fixing frame, the fixing frame is connected with a mounting plate used for mounting an air chamber cover plate through the conduction structure, the mounting plate is connected with a connecting plate used for being connected with a stretching plate, and the purpose of reducing the production cost of a mold is achieved.

Description

Technical Field

[0001] The utility model relates to the field of plastic product molding, in particular to a bridge-type stretching device of a multi-station plastic thermoforming machine. Background Art

[0002] like Figure 1 As shown, the existing mold for producing plastic lunch boxes includes an upper mold 2 and a lower mold 3, wherein the upper mold 2 includes an upper fixed plate 21, a fixed frame 22, a stretching plate 23, a stretching column 24, a plunger 25, an air chamber cover plate 26, a surrounding edge 27, and a pressing frame 28. The lower mold 3 includes a push plate 31, a cavity plate 32, a water plate 33, a lower fixed plate 34, a heightening column 35, and a placement plate 36.

[0003] In order to match the size of the existing heat-pressing forming machine, the fixing plate and the fixing frame 22 of the upper mold 2 must have sufficient height to be installed on the existing heat-pressing forming machine. Therefore, the overall thickness of the upper mold 2 is thicker, the cost of the mold during production is higher, and the mold is larger. Utility Model Content

[0004] In view of this, the utility model aims to provide a bridge-type stretching device for a multi-station plastic thermoforming machine, so as to reduce the production cost of the mold and the overall thickness of the mold.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a bridge-type stretching device for a multi-station plastic thermoforming machine, comprising a frame, a fixed frame and a mounting structure for connecting to a lower mold, the mounting structure is arranged on the frame, a support shaft is fixedly connected to the frame, a conduction structure is arranged on the fixed frame, an adjustment sleeve is threadedly connected to the support shaft, the adjustment sleeve is rotatably connected to the fixed frame, the fixed frame is connected to a mounting plate for mounting an air chamber cover plate through the conduction structure, and a connecting plate for connecting a stretching plate is connected to the mounting plate.

[0006] To implement the above technical solution, the stretching plate is fixedly connected to the connecting plate, the air chamber cover plate is fixedly connected to the mounting plate, the adjusting sleeve is rotated, the adjusting sleeve moves along the length direction of the fixed shaft, the fixing frame moves synchronously with the adjusting sleeve, and the mounting plate is driven to move along the supporting shaft through the conduction structure, so that the distance between the mounting plate and the mounting structure can be adjusted to adapt to molds of different depths; thereby eliminating the need for an upper fixed plate and a fixed frame in the upper mold, thereby reducing the overall thickness of the mold and reducing the production cost of the mold.

[0007] As a preferred solution of the utility model, the fixed frame is connected to a power motor, the power shaft of the power motor is connected to a first connecting wheel, the adjusting sleeve is connected to a second connecting wheel, and the first connecting wheel drives the second connecting wheel to rotate through a connecting strip.

[0008] To implement the above technical solution, the power motor is started, the power shaft rotates, the power shaft drives the first connecting wheel to rotate, and the first connecting wheel drives the second connecting wheel to rotate through the connecting strip, thereby adjusting the position of the fixing frame and the mounting plate, which is easy to operate.

[0009] As a preferred solution of the utility model, a plurality of the second connecting wheels are provided, a tensioning wheel is provided on the fixing frame, and the first connecting wheel drives the tensioning wheel and the plurality of second connecting wheels to rotate through the connecting strip.

[0010] To implement the above technical solution, multiple support shafts are provided, and multiple second connecting wheels are also provided. Therefore, the fixed frame can move more smoothly along the support shaft, and through the rotation of the first connecting wheel, the connecting strip can drive the multiple second connecting wheels to rotate synchronously, so that the fixed frame can move more smoothly along the support shaft.

[0011] As a preferred solution of the utility model, an expansion sleeve is connected between the second connecting wheel and the adjusting sleeve, the inner wall of the second connecting wheel is tightly pressed against the outer wall of the expansion sleeve, and the inner wall of the expansion sleeve is tightly pressed against the outer wall of the adjusting sleeve.

[0012] The above technical solution is implemented to make the connection between the second connecting wheel and the adjusting sleeve more stable.

[0013] As a preferred solution of the utility model, the fixing frame is connected to a supporting frame, the supporting frame is connected to a power cylinder, and the power rod of the power cylinder is pressed against the supporting shaft to reduce the thread gap between the adjusting sleeve and the supporting shaft.

[0014] To implement the above technical solution, the power rod is retracted and separated from the support shaft. At this time, the power motor is turned on to adjust the position of the fixing frame. After the fixing frame is adjusted to a suitable position, the power cylinder is turned on, and the power rod is extended and pressed against the end of the support shaft. At this time, a pulling force is applied to the fixing frame through the support frame to reduce or eliminate the thread gap between the adjustment sleeve and the support shaft, so that the fixing frame is not easily vibrated due to the thread gap.

[0015] As a preferred solution of the utility model, the mounting plate is fixedly connected to a support plate, the support plate is rotatably connected to an adjustment shaft, the adjustment shaft is threadedly connected to a cross bridge, the cross bridge is connected to a slide rod, the slide rod is connected to the connecting plate, and the slide rod is slidably connected to the mounting plate.

[0016] To implement the above technical solution, the adjusting shaft rotates, and the cross bridge moves along the length direction of the adjusting shaft through the conduction effect of the thread. The cross bridge drives the sliding rod to move, and the sliding rod drives the connecting plate to move, thereby being able to adjust the distance between the stretching column, the plunger and the mounting plate to adapt to a variety of molds and improve practicality.

[0017] As a preferred solution of the utility model, the support plate is connected with a slide rail, the cross bridge is slidably connected to the slide rail, and the length direction of the slide rail is parallel to the length direction of the adjustment shaft.

[0018] To implement the above technical solution, when the adjusting shaft rotates, the cross bridge moves along the length direction of the adjusting shaft through the conduction effect of the thread. At the same time, the cross bridge moves along the length direction of the slide rail, so that the cross bridge moves more smoothly and the adjusting shaft is not easily stuck.

[0019] As a preferred solution of the utility model, an adjusting motor is connected to the support plate, and an adjusting rod of the adjusting motor is connected to the adjusting shaft.

[0020] To implement the above technical solution, the adjusting motor is started, and the adjusting rod drives the adjusting shaft to rotate, thereby adjusting the position of the cross bridge, which makes the operation easier and more labor-saving.

[0021] As a preferred solution of the utility model, a guard plate is connected to the side wall of the support plate, and the mounting plate and the guard plate form a receiving cavity for placing the slide rail.

[0022] The above technical solution is implemented to enhance the protection of the slide rail, making it difficult for foreign objects to fall on the slide rail and for the cross bridge to get stuck on the slide rail.

[0023] In summary, the utility model has the following beneficial effects:

[0024] 1. The upper fixed plate and fixed frame of the upper mold of the mold are eliminated, thereby greatly reducing the production cost of the mold and reducing the overall thickness of the mold;

[0025] 2. This patent application can seamlessly connect existing molds, reducing the company's production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the mold;

[0027] Figure 2 To embody the external structure schematic diagram of the utility model;

[0028] Figure 3 A schematic diagram showing the position of the slide rail;

[0029] Figure 4 A schematic diagram showing the position of the expansion sleeve;

[0030] Figure 5 This is a schematic diagram showing the installation of the connecting strip.

[0031] Figure numerals: 2, upper die; 21, upper fixed plate; 22, fixed frame; 23, stretching plate; 24, stretching column; 25, plunger; 26, air chamber cover plate; 27, surrounding edge; 28, pressing frame; 3, lower die; 31, push plate; 32, cavity plate; 33, water plate; 34, lower fixed plate; 35, heightening column; 36, placement plate; 4, frame; 41, mounting structure; 42, support shaft; 421, threaded section; 5, fixed frame; 51, adjustment Joint sleeve; 6, power motor; 60, connecting strip; 61, first connecting wheel; 62, second connecting wheel; 63, tensioning wheel; 64, expansion sleeve; 7, support frame; 71, power cylinder; 711, power rod; 8, mounting plate; 81, conduction structure; 82, support plate; 83, adjusting motor; 831, adjusting rod; 84, adjusting shaft; 91, cross bridge; 92, sliding rod; 921, connecting plate; 93, sliding rail; 94, sliding block; 95, guard plate. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0033] A bridge-type stretching device for a multi-station plastic thermoforming machine includes a frame 4, a fixed frame 5, and a mounting structure 41 for connecting with a lower mold 3. The mounting structure 41 is a prior art and is arranged on the frame 4. Four supporting shafts 42 are fixedly connected to the frame 4. The four supporting shafts 42 are respectively located at four corners of the frame 4 and are all vertically arranged. A conducting structure 81 is arranged on the fixed frame 5.

[0034] The upper end of the support shaft 42 is a threaded section 421. A coaxially arranged adjusting sleeve 51 is threadedly connected to the threaded section 421, and the adjusting sleeve 51 is rotatably connected to the fixing frame 5. Four adjusting sleeves 51 are respectively located at four corners of the fixing frame 5.

[0035] A power motor 6 is fixedly connected to the upper surface of the fixing frame 5. The power motor 6 is a servo motor. A first connecting wheel 61 is fixedly connected to the power shaft of the power motor 6. A second connecting wheel 62 is fixedly connected to the outer wall of each adjusting sleeve 51. The first connecting wheel 61 drives the second connecting wheel 62 to rotate through the connecting strip 60. A tensioning wheel 63 is arranged on the fixing frame 5.

[0036] The first connecting wheel 61 , the second connecting wheel 62 , and the tensioning wheel 63 are all sprockets, and the connecting bar 60 is a chain. Figure 5 The dotted line in FIG. 6 is the installation method of the connecting strip 60 .

[0037] In order to make the connection between the second connecting wheel 62 and the adjusting sleeve 51 more stable, an expansion sleeve 64 is connected between the second connecting wheel 62 and the adjusting sleeve 51. The inner wall of the second connecting wheel 62 is pressed against the outer wall of the expansion sleeve 64; the inner wall of the expansion sleeve 64 is pressed against the outer wall of the adjusting sleeve 51.

[0038] A support frame 7 is fixedly connected to the upper surface of the fixing frame 5, and a vertically arranged power cylinder 71 is fixedly connected to the support frame 7, and one power cylinder 71 is arranged on each supporting shaft 42. The power cylinder 71 is a gas cylinder.

[0039] As above, the power cylinder 71 is started, so that the power rod 711 of the power cylinder 71 is retracted and separated from the end of the support shaft 42. The power motor 6 is turned on, and the four second connecting wheels 62 rotate synchronously to adjust the position of the fixing frame 5 on the support shaft 42. After the position of the fixing frame 5 is adjusted, the power motor 6 is stopped, the power cylinder 71 is started, and the power rod 711 is pressed against the end of the support shaft 42. At this time, the support frame 7 applies an upward pulling force to the fixing frame 5, and the thread gap between the adjustment sleeve 51 and the support shaft 42 is reduced or eliminated through the action of the upward pulling force.

[0040] The fixing frame 5 is connected to a mounting plate 8 for mounting the air chamber cover plate 26 via a conductive structure 81, and the mounting plate 8 is located below the fixing frame 5. The four corners of the mounting plate 8 are respectively slidably connected to four support shafts 42. The mounting plate 8 is arranged horizontally.

[0041] The conducting structure 81 is a prior art and will not be described in detail in this embodiment. The conducting structure 81 serves to enable the mounting plate 8 to reciprocate along the length direction of the supporting shaft 42 .

[0042] A vertical support plate 82 is fixedly connected to both ends of the mounting plate 8, and a vertical adjustment motor 83 is fixedly connected to the support plate 82. An adjustment rod 831 of the adjustment motor 83 is fixedly connected to an adjustment shaft 84, and the adjustment shaft 84 is vertically arranged. The adjustment shaft 84 is rotatably connected to the support plate 82. The adjustment shaft 84 is coaxially arranged with the adjustment rod 831.

[0043] A horizontally arranged cross bridge 91 is threadedly connected to the adjusting shaft 84, and the cross bridge 91 is located above the mounting plate 8. Two vertically arranged slide bars 92 are connected to the cross bridge 91, and the slide bars 92 pass through the mounting plate 8 and are fixedly connected to the connecting plate 921, and the connecting plate 921 is used to be fixedly connected to the stretching plate 23.

[0044] A vertically arranged slide rail 93 is fixedly connected to the support plate 82, and the end of the cross bridge 91 is slidably connected to the slide rail 93 through a slider 94, and the length direction of the slide rail 93 is parallel to the length direction of the adjustment shaft 84. In order to improve stability, two slide rails 93 are installed on each support plate 82.

[0045] A guard plate 95 with a trapezoidal cross section is fixedly connected to the side wall of the support plate 82 , and the mounting plate 8 and the guard plate 95 form a receiving cavity for placing the slide rail 93 .

[0046] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A bridge-type stretching device for a multi-station plastic thermoforming machine, comprising a frame (4), a fixed frame (5) and a mounting structure (41) for connecting with a lower mold (3), wherein the mounting structure (41) is arranged on the frame (4), a support shaft (42) is fixedly connected to the frame (4), and a conducting structure (81) is arranged on the fixed frame (5), wherein: An adjusting sleeve (51) is threadedly connected to the support shaft (42), and the adjusting sleeve (51) is rotatably connected to the fixing frame (5). The fixing frame (5) is connected to a mounting plate (8) for mounting an air chamber cover plate (26) through the conducting structure (81), and a connecting plate (921) for connecting a stretching plate (23) is connected to the mounting plate (8).

2. The bridge-type stretching device of a multi-station plastic thermoforming machine according to claim 1 is characterized in that: The fixing frame (5) is connected to a power motor (6), a power shaft of the power motor (6) is connected to a first connecting wheel (61), the adjusting sleeve (51) is connected to a second connecting wheel (62), and the first connecting wheel (61) drives the second connecting wheel (62) to rotate via a connecting strip (60).

3. The bridge-type stretching device of a multi-station plastic thermoforming machine according to claim 2 is characterized in that: A plurality of the second connecting wheels (62) are provided, a tensioning wheel (63) is provided on the fixing frame (5), and the first connecting wheel (61) drives the tensioning wheel (63) and the plurality of second connecting wheels (62) to rotate through the connecting strip (60).

4. The bridge-type stretching device of a multi-station plastic thermoforming machine according to claim 3 is characterized in that: An expansion sleeve (64) is connected between the second connecting wheel (62) and the adjusting sleeve (51), the inner wall of the second connecting wheel (62) is tightly pressed against the outer wall of the expansion sleeve (64), and the inner wall of the expansion sleeve (64) is tightly pressed against the outer wall of the adjusting sleeve (51).

5. The bridge-type stretching device of a multi-station plastic thermoforming machine according to claim 1 is characterized in that: The fixing frame (5) is connected to a support frame (7), and the support frame (7) is connected to a power cylinder (71). When a power rod (711) of the power cylinder (71) is pressed against a support shaft (42), the thread clearance between the adjustment sleeve (51) and the support shaft (42) is reduced.

6. A bridge-type stretching device for a multi-station plastic thermoforming machine according to any one of claims 1 to 5, characterized in that: The mounting plate (8) is fixedly connected to a support plate (82), the support plate (82) is rotatably connected to an adjustment shaft (84), the adjustment shaft (84) is threadedly connected to a cross bridge (91), the cross bridge (91) is connected to a slide rod (92), the slide rod (92) is connected to a connecting plate (921), and the slide rod (92) is slidably connected to the mounting plate (8).

7. The bridge-type stretching device of a multi-station plastic thermoforming machine according to claim 6 is characterized in that: The support plate (82) is connected with a slide rail (93), the cross bridge (91) is slidably connected to the slide rail (93), and the length direction of the slide rail (93) is parallel to the length direction of the adjustment shaft (84).

8. The bridge-type stretching device of a multi-station plastic thermoforming machine according to claim 7 is characterized in that: The support plate (82) is connected to an adjusting motor (83), and the adjusting rod (831) of the adjusting motor (83) is connected to the adjusting shaft (84).

9. The bridge-type stretching device of a multi-station plastic thermoforming machine according to claim 8, characterized in that: A guard plate (95) is connected to the side wall of the support plate (82), and the mounting plate (8) and the guard plate (95) form a receiving cavity for placing the slide rail (93).

Images