Double-rack linkage stretching mechanism

Abstract

The utility model discloses a double-rack linkage stretching mechanism which comprises an upper forming die and a lower forming die which are matched with each other, die cores capable of moving up and down are respectively arranged in the upper forming die and the lower forming die, the upper forming die and the lower forming die are respectively provided with a forming die mounting movable plate, and the movable plates are respectively provided with a guide pillar and a lifting driving structure. The device is characterized in that two rack mounting seats are symmetrically arranged on the movable plate, stretching racks are arranged on the rack mounting seats in a lifting and sliding mode, the stretching racks are provided with upper and lower guide sleeves in a matched mode, gears are meshed with the middles of the stretching racks, the gears are arranged on gear shafts, and the gear shafts are rotatably arranged on the movable plate and provided with gear motors in a matched mode; one ends of the two stretching racks are connected to a stretching plate, and the stretching plate is connected with the mold core. The double-rack linkage stretching is adopted, the stretching action balance of the stretching plate is high, and the double-rack linkage stretching device is suitable for super-large-layout sheet forming.

Description

Technical Field

[0001] The utility model relates to an improved invention of a plastic sheet forming machine, in particular to an improved invention of a double-rack linkage stretching mechanism. Background Art

[0002] Super-large sheet stretching mechanisms are widely used in the processing of various materials, especially in the fields of plastics. These mechanisms usually include a stretching plate, a drive mechanism and a control system, which are used to stretch the sheet uniformly to achieve the desired size and shape. Although the existing large-format sheet stretching mechanisms have made significant progress in many aspects, there are still some problems in practical applications, especially the stability of the stretching plate. Since the lifting and lowering driving force of the stretching plate acts at the center of the stretching plate, a single-point support, and the stretching plate has a large layout, the stretching force may be different at different positions. During the stretching process, the stretching plate may deflect, resulting in uneven stretching and local deformation of the sheet, affecting product quality. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a double-rack linkage stretching mechanism with stable stretching and strong balance.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme to achieve the goal: the double-rack linkage stretching mechanism includes a matching upper molding die and a lower molding die, and the upper molding die and the lower molding die are respectively provided with a mold core that can be lifted and lowered, and the upper molding die and the lower molding die are respectively provided with a molding mold mounting movable plate, and the movable plates are respectively provided with guide columns and a lifting drive structure, and are characterized in that: two symmetrically arranged rack mounting seats are provided on the movable plate, and a stretching rack is provided on the rack mounting seat which can be lifted and slid, and the stretching rack is provided with upper and lower guide sleeves, and a gear is meshed in the middle of the stretching rack, and the gear is provided on the gear shaft, and the gear shaft can be rotatably provided on the movable plate, and is provided with a reduction motor; one end of the two stretching racks are connected to the stretching plate, and the stretching plate is connected to the mold core.

[0005] The two gear shafts corresponding to the two stretching racks are arranged in linkage, a connecting sleeve is provided between the adjacent shaft ends of the corresponding two gear shafts, expansion sleeves are provided at both ends of the connecting sleeve, and the two gear shafts share a reduction motor.

[0006] The stretching plate is equipped with a lifting guide rod, and the lifting guide rod is arranged between the upper forming die and its movable plate and between the lower forming die and its movable plate.

[0007] The stretching plate is connected with the stretching rack by a hook, a hook groove is arranged on the corresponding stretching plate, a hook head is arranged at one end of the rack, and the hook head matches the hook groove.

[0008] The lifting drive structure is a connecting rod assembly and a transmission motor thereof.

[0009] The beneficial effect of the utility model is that the improved double-rack linkage stretching mechanism adopts double-rack linkage stretching to form two-point symmetrical supports on the stretching plate, so that the stretching action of the stretching plate is well balanced, the sheet is stretched evenly and of high quality, and is suitable for ultra-large format sheet forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is the AA cross-sectional view of the present utility model.

[0013] Figure 3 It is a CC sectional view of the present utility model. DETAILED DESCRIPTION

[0014] The accompanying drawings show the structure of the utility model, and the following further describes its relevant details in conjunction with the accompanying drawings. Figure 1-3 The double rack linkage stretching mechanism comprises a matching forming upper die 1 and a forming lower die 2, wherein the forming upper die 1 and the forming lower die 2 are respectively provided with a mold core that can be lifted and lowered, and the forming upper die 1 and the forming lower die 2 are respectively provided with a forming mold mounting movable plate 3, the upper movable plate 3 is connected to the upper end of the forming upper die 1 through a connecting rod, and the lower movable plate 3 is connected to the lower end of the forming lower die 2 through a connecting rod, and the movable plate 3 is respectively provided with a guide column 4 and a lifting drive structure 5, and the movable plate 3 is provided with two symmetrically arranged rack mounting seats 6, and the rack mounting seats 6 can be lifted and slidably provided with a stretching Rack 7, and the stretching rack 7 is equipped with upper and lower guide sleeves 8, the upper and lower guide sleeves 8 are fixed on the rack mounting seat 6 to guide the stretching rack 7 to rise and fall, a gear 9 is meshed in the middle of the stretching rack 7, the gear 9 is arranged on the gear shaft 10, the gear shaft 10 is rotatably arranged on the movable plate 3, the corresponding movable plate 3 is provided with bearings, and is equipped with a reduction motor 11, the reduction motor 11 is installed on the mounting plate 17, and the mounting plate is fixed on one side of the movable plate 3; one end of the two stretching racks 7 are connected to the stretching plate 12, forming two-point symmetrical supports on the stretching plate 12, and the stretching plate 12 is connected to the mold core.

[0015] According to the working principle of the utility model, the lifting drive structure 5 drives the movable plate 3 to lift and lower along the guide column 4, and the corresponding molding upper mold 1 and the molding lower mold 2 are lifted and lowered in conjunction with their respective movable plates 3, and the molding upper mold 1 and the molding lower mold 2 move toward each other to complete the mold closing, and then, the reduction motor 11 drives the gear shaft 10 and the gear 9 thereon to rotate, and the gear 9 drives the stretching rack 7 to lift and lower, and the two stretching racks 7 jointly drive the corresponding stretching plate 12 to lift and lower, to ensure the stability of the lifting and lowering action of the stretching plate 12, and the corresponding mold core in the upper mold is driven by the stretching plate 12 located above to enter the membrane cavity for stretching molding, and the mold core in the lower mold is driven by the stretching plate 12 located below to enter the membrane cavity for stretching molding, and according to the stretching requirements of the product, only the mold core of the upper mold is stretched or the mold core of the lower mold is stretched, or the mold core of the upper mold and the mold core of the lower mold are stretched together.

[0016] As a further improved specific implementation method, the two gear shafts 10 corresponding to the two stretching racks 7 are arranged in linkage, and a connecting sleeve 13 is provided between the adjacent shaft ends of the corresponding two gear shafts 10. Expansion sleeves 14 are provided at both ends of the connecting sleeve 13. The expansion sleeve 14 is tightly fitted between the connecting sleeve 13 and the gear shaft 10. The two gear shafts 10 share a reduction motor 11 to realize the linkage of the two gear shafts 10 and the gear 9.

[0017] As a further improved specific implementation method, the stretching plate 12 is equipped with a lifting guide rod 15, and the lifting guide rod 15 is arranged between the forming upper mold 1 and its movable plate 3 and between the forming lower mold 2 and its movable plate 3 to guide the lifting of the stretching plate 12, thereby further improving the stability of the lifting action of the stretching plate 12.

[0018] As a further improved specific implementation method, the stretching plate 12 is connected to the stretching rack 7 by a hook 16. The corresponding stretching plate 12 is provided with a hook groove, and a hook head is provided at one end of the rack. The hook head matches the hook groove, which facilitates the stretching plate 12 and the stretching rack 7 to be quickly and stably connected.

[0019] As a further improved specific implementation method, the lifting drive structure 5 is a connecting rod combination and its transmission motor. The specific connecting rod arrangement and transmission method are existing structures and will not be described in detail here.

[0020] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. Double rack linkage stretching mechanism, including matching forming upper die and forming lower die, each of which is provided with a mold core capable of lifting and lowering, each of which is provided with a forming mold mounting movable plate, each of which is provided with a guide column and a lifting drive structure, characterized in that: The movable plate is provided with two symmetrically arranged rack mounting seats, on which a stretching rack is provided which can be raised and lowered and slidably mounted, and the stretching rack is provided with upper and lower guide sleeves, a gear is meshed in the middle of the stretching rack, and the gear is provided on a gear shaft, which is rotatably provided on the movable plate and is provided with a reduction motor; one ends of the two stretching racks are connected to the stretching plate, and the stretching plate is connected to the mold core.

2. The double-rack linkage stretching mechanism according to claim 1, characterized in that: The two gear shafts corresponding to the two stretching racks are arranged in linkage, a connecting sleeve is provided between the adjacent shaft ends of the corresponding two gear shafts, expansion sleeves are provided at both ends of the connecting sleeve, and the two gear shafts share a reduction motor.

3. The double-rack linkage stretching mechanism according to claim 1, characterized in that: The stretching plate is equipped with a lifting guide rod, and the lifting guide rod is arranged between the forming upper die and its movable plate and between the forming lower die and its movable plate.

4. The double-rack linkage stretching mechanism according to claim 1, characterized in that: The stretching plate is connected with the stretching rack by a hook, a hook groove is arranged on the corresponding stretching plate, a hook head is arranged at one end of the rack, and the hook head matches the hook groove.

5. The double-rack linkage stretching mechanism according to claim 1, characterized in that: The lifting drive structure is a connecting rod assembly and a transmission motor thereof.

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