Die changing device of blow molding machine

Abstract

The utility model relates to a mold changing device of a blow molding machine, the mold changing device comprises a fixed mold plate and a movable mold plate, a fixed mold is clamped on the fixed mold plate, a movable mold is clamped on the movable mold plate, a mold changing mechanism is arranged on the fixed mold plate and the movable mold plate, the mold changing mechanism comprises an insertion rod and a limiting piece, the insertion rod is slidably arranged on the fixed mold plate, and the limiting piece is arranged on the insertion rod. One end of the inserting rod is connected with one side of the fixed mold in an inserting manner, and the limiting piece is arranged on the fixed mold plate; the fixed mold and the movable mold are installed on the fixed mold plate and the movable mold plate in a clamped mode correspondingly, the fixed mold and the movable mold are connected in an inserted mode through sliding of the insertion rods, the positions of the insertion rods are limited and locked through the limiting pieces, and the mold fixing device has the effect of conveniently fixing, disassembling and replacing the mold.

Description

Technical Field

[0001] This application relates to the field of blow molding machines, and more particularly to a mold changing device for a blow molding machine. Background Technology

[0002] A flatbed cart is a tool cart designed specifically for auto mechanics and used for repairing car chassis. Flatbed carts are typically produced using blow molding machines.

[0003] A blow molding machine includes an extruder, an air blowing device, and a mold clamping mechanism. Material is fed into the extruder through a hopper. The extruder heats and melts the plastic granules and extrudes them. A tubular parison is extruded through the die head. The mold clamping mechanism closes and holds the parison. At this time, the air blowing device injects high-pressure gas into the parison. The parison expands and fits the mold to complete the molding process.

[0004] In the existing technology, molds are usually installed on the template of the blow molding machine by fixing them with high-strength bolts. However, when producing flatbed carts of different shapes and sizes, the corresponding molds need to be changed. The molds fixed with high-strength bolts are inconvenient to disassemble and replace, resulting in a large workload for operators and low mold replacement efficiency. Utility Model Content

[0005] To address the inconvenience and low efficiency of mold replacement operations using high-strength bolts, this application provides a mold changing device for a blow molding machine.

[0006] The mold changing device for a blow molding machine provided in this application adopts the following technical solution:

[0007] A mold changing device for a blow molding machine includes a fixed mold plate and a movable mold plate disposed on the blow molding machine body. The fixed mold plate and the movable mold plate are distributed opposite to each other. A fixed mold is snapped onto the fixed mold plate, and a movable mold is snapped onto the movable mold plate. A mold changing mechanism is provided on the fixed mold plate. The mold changing mechanism includes an insert rod and a limiting member. The insert rod is slidably installed on the fixed mold plate, and one end of the insert rod is inserted and connected to one side of the fixed mold. The limiting member is disposed on the fixed mold plate and is used to limit and lock the position of the insert rod. The movable mold plate is provided with the same mold changing mechanism.

[0008] By adopting the above technical solution, the fixed mold and the moving mold are snapped and installed on the fixed template and the moving template respectively, the insert rod slides and inserts and connects the fixed mold and the moving mold, and the limiting component limits and locks the position of the insert rod, which facilitates the fixing, disassembly and replacement of the mold.

[0009] Optionally, the fixed mold is provided with a card plate, the fixed template is provided with a card slot, the card plate is connected to the fixed template through the card slot, the card plate is provided with an insertion hole, and the insertion rod is connected to the card plate through the insertion hole.

[0010] By adopting the above technical solution, the card plate is snapped into the slot on the fixed template, and the insertion rod is inserted into the card plate through the insertion hole, thereby fixing the fixed mold and the fixed template. The insertion and positioning operation of the insertion rod is convenient.

[0011] Optionally, the card plate is provided in two pieces and is located at the top and bottom of the fixed mold respectively, and the insert rod is provided in two pieces and is distributed parallel to each other, with the insert rods on both sides moving in opposite directions.

[0012] By adopting the above technical solution, the upper and lower plates respectively position the top and bottom of the fixed mold, and the two parallel insert rods move in opposite directions to perform insertion and positioning operations on the fixed mold from both the top and bottom, which facilitates the positioning and fixing of the fixed mold.

[0013] Optionally, a first rack and a second rack are slidably installed in the fixed template, which are distributed parallel to each other. The first rack and the second rack are opposite to each other. The insert rods on both sides are respectively connected to one end of the first rack and the second rack. A gear is rotatably installed in the fixed template, and the first rack and the second rack mesh with the gear at opposite sides.

[0014] By adopting the above technical solution, when the gear rotates, it synchronously drives the first rack and the second rack on both sides to slide, causing the insert rods on both sides to move synchronously in opposite directions, which facilitates the insertion and disengagement of the insert rods from the fixed mold, and thus facilitates the replacement of the fixed mold.

[0015] Optionally, the limiting component includes a limiting rod and a push rod. The limiting rod is slidably installed on the fixed template. One side of the limiting rod abuts against the end of the first rack away from the insert rod. The push rod is disposed at one end of the limiting rod. A limiting spring is sleeved on the push rod. One end of the limiting spring is connected to one end of the limiting rod.

[0016] By adopting the above technical solution, the limiting spring pushes the push rod to cause one side of the limiting rod to abut against the end of the first rack away from the insert rod, thereby limiting the position of the first rack and fixing the position of the insert rod, thus realizing the installation of the fixed mold.

[0017] Optionally, a guide bar is provided on the side of the second rack away from the insertion rod, the guide bar is slidably connected to the fixed template, and an abutment spring is sleeved on the guide bar.

[0018] By adopting the above technical solution, when the second rack slides, the guide bar slides and connects with the fixed template. The abutment spring pushes the insertion rod at one end of the second rack to be inserted into the insertion hole, thereby pre-positioning the fixed template and facilitating subsequent limiting operations.

[0019] Optionally, a rotating rod is rotatably mounted on the push rod at one end away from the limiting rod and located outside the fixed template. The rotating rod rotates along the cross-sectional radius of the push rod. A positioning rod is provided on the side of the rotating rod facing the push rod at one end away from the push rod. A positioning hole is provided on the fixed template, and the positioning rod is inserted into the fixed template through the positioning hole.

[0020] By adopting the above technical solution, when the rotating rod rotates to align the positioning rod with the positioning hole on the fixed template and inserts it, the position of the push rod is positioned. At this time, the position of the limit rod is locked, thereby limiting and locking the position of the insertion rod, improving the stability of the mold.

[0021] Optionally, the gear is coaxially connected to a rotating shaft, one end of which is located outside the fixed template, and a handwheel is coaxially provided on the rotating shaft.

[0022] By adopting the above technical solution, the rotation of the handwheel drives the gear rotation, making it convenient for the operator to manually rotate the handwheel to drive the gear rotation.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The mold changing mechanism uses the insert rod and limiting parts to achieve the snap-fit ​​and limiting of the mold and the template, which makes the mold changing operation more convenient compared with the high-strength bolt fixing.

[0025] 2. The use of clamping plates and insertion holes in conjunction with insertion rods enhances the stability of mold installation.

[0026] 3. The meshing structure of the first rack, the second rack and the gear allows the two insert rods on both sides to move in opposite directions, improving the convenience and efficiency of mold changing. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of this application.

[0028] Figure 2 This is an exploded structural diagram of the fixed template and the fixed mold in this application.

[0029] Figure 3 This is a schematic diagram of the cross-sectional structure along the vertical direction of the template in this application.

[0030] Those skilled in the art will understand that the elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be enlarged relative to other elements to aid in understanding the embodiments of the invention.

[0031] Reference numerals in the attached drawings: 1. Blow molding machine body; 2. Fixed template; 21. Fixed mold; 211. Clamping plate; 2111. Insertion hole; 22. Clamping slot; 23. First rack; 24. Second rack; 241. Guide bar; 242. Abutment spring; 25. Gear; 26. Rotating shaft; 27. Handwheel; 28. Positioning hole; 3. Moving template; 31. Moving mold; 4. Insertion rod; 5. Limiting component; 51. Limiting rod; 52. Push rod; 521. Rotating rod; 522. Positioning rod; 53. Limiting spring. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] This application discloses a mold changing device for a blow molding machine, referring to... Figure 1 and Figure 2 The system includes a fixed mold plate 2 and a moving mold plate 3, which are vertically arranged on the blow molding machine body 1 and relatively distributed. A fixed mold 21 is snapped onto the fixed mold plate 2, and a moving mold 31 is snapped onto the moving mold plate 3. Both the fixed mold plate 2 and the moving mold plate 3 are equipped with the same mold changing mechanism, which includes an insert rod 4 and a limiting member 5. The insert rod 4 is slidably installed on the fixed mold plate 2 in a vertical direction. The insert rod 4 is cylindrical, and one end of the insert rod 4 is inserted into one side of the fixed mold 21 to achieve initial positioning of the fixed mold 21. The limiting member 5 is provided on the fixed mold plate 2 and is used to limit and lock the position of the insert rod 4. The fixed mold 21 and the moving mold 31 are snapped onto the fixed mold plate 2 and the moving mold plate 3, respectively. The insert rod 4 slides and inserts into the fixed mold 21 and the moving mold 31. The limiting member 5 limits and locks the position of the insert rod 4, which facilitates the fixing, disassembly and replacement of the mold.

[0034] Reference Figure 1 and Figure 2 A horizontal clamping plate 211 is provided on the fixed mold 21 facing the fixed template 2. Two clamping plates 211 are provided, one at the top and one at the bottom of the fixed mold 21. The fixed template 2 has slots 22 at the top and bottom. The clamping plates 211 are engaged with the fixed template 2 through the slots 22. The upper and lower clamping plates 211 respectively position the top and bottom of the fixed mold 21. A through insertion hole 2111 is provided on the clamping plate 211. The insertion rod 4 is inserted into the clamping plate 211 through the insertion hole 2111. There are two insertion rods 4, which are parallel to each other. The two insertion rods 4 on both sides move in opposite directions. The fixed mold 21 is simultaneously engaged and positioned from both the top and bottom, making the positioning of the fixed mold 21 more accurate and stable.

[0035] Reference Figure 1 and Figure 2A first rack 23 and a second rack 24, parallel to each other, are slidably installed inside the fixed template 2. Both racks 23 and 24 are vertically arranged and opposite to each other. Insert rods 4 on both sides are connected to one end of the first rack 23 and the second rack 24, respectively. A gear 25 is rotatably installed inside the fixed template 2. A rotating shaft 26 is coaxially fixed to the gear 25. One end of the rotating shaft 26 is located outside the fixed template 2, and a handwheel 27 is coaxially mounted on the other end of the rotating shaft 26. The operator rotates the handwheel 27 to drive the gear 25 to rotate. The first rack 23 and the second rack 24 mesh with the gear 25 on opposite sides. When the gear 25 rotates, it synchronously drives the first rack 23 and the second rack 24 on both sides to slide, thereby causing the insert rods 4 on both sides to move synchronously in opposite directions, facilitating the insertion and disengagement of the insert rods 4 from the fixed template 21.

[0036] Reference Figure 1 and Figure 2 A guide bar 241 is vertically mounted on the end of the second rack 24 opposite to the insertion rod 4. The guide bar 241 is slidably connected to the fixed template 2. A retaining spring 242 is fitted on the guide bar 241, and one end of the retaining spring 242 is connected to one end of the second rack 24. When the second rack 24 slides, the guide bar 241 is slidably connected to the fixed template 2, and the retaining spring 242 pushes the insertion rod 4 at one end of the second rack 24 to insert into the insertion hole 2111, pre-positioning the fixed template 21 to facilitate subsequent limiting operations.

[0037] Reference Figure 2 and Figure 3 The limiting component 5 includes a limiting rod 51 and a push rod 52. The limiting rod 51 is slidably mounted on the fixed mold plate 2 in the horizontal direction. The limiting rod 51 and the first rack 23 are perpendicular to each other. One side of the limiting rod 51 abuts against the end of the first rack 23 away from the insertion rod 4. The push rod 52 is located at the end of the limiting rod 51 away from the first rack 23. A limiting spring 53 is sleeved on the push rod 52, and one end of the limiting spring 53 is connected to one end of the limiting rod 51. The limiting spring 53 pushes the push rod 52, causing one side of the limiting rod 51 to abut against the end of the first rack 23 away from the insertion rod 4, thus limiting the position of the first rack 23 and fixing the position of the insertion rod 4, thereby realizing the installation of the fixed mold 21.

[0038] Reference Figure 3A rotating rod 521 is rotatably installed on the outside of the fixed template 2, away from the end of the push rod 52 and opposite to the limit rod 51. The rotating rod 521 and the push rod 52 are perpendicular to each other. The rotating rod 521 rotates along the cross-sectional radius of the push rod 52. A positioning rod 522 is provided on the side of the rotating rod 52 away from the push rod 52 and facing the push rod 52. A positioning hole 28 is provided on the fixed template 2. The positioning rod 522 is inserted and connected to the fixed template 2 through the positioning hole 28. When the rotating rod 521 rotates to align the positioning rod 522 with the positioning hole 28 on the fixed template 2 and insert it, the position of the push rod 52 can be positioned. At this time, the position of the limiting rod 51 is locked, thereby limiting and locking the position of the insert rod 4. When the mold needs to be disassembled, the push rod 52 is pulled until the positioning rod 522 is disengaged from the positioning hole 28. At this time, the limiting spring 53 is compressed, and the rotating rod 521 is rotated until the positioning rod 522 is misaligned with the positioning hole 28 and abuts against the outer side wall of the fixed template 2, so that the gear 25 can rotate to drive the insert rods 4 on both sides to move.

[0039] The implementation principle of the mold changing device of the blow molding machine in this application embodiment is as follows: When it is necessary to disassemble the mold, the push rod 52 is pulled until the positioning rod 522 is disengaged from the positioning hole 28. At this time, the limit spring 53 is compressed, and the rotating rod 521 is rotated until the positioning rod 522 is misaligned with the positioning hole 28 and abuts against the outer side wall of the fixed platen 2. The rotating shaft 26 is rotated to drive the gear 25 to rotate. The gear 25 drives the first rack 23 and the second rack 24 on both sides to slide, driving the insertion rod 4 to disengage from the insertion hole 2111. At this time, the mold is removed.

[0040] When mold installation is required, the mold is snapped into the fixed template 2 or the moving template 3. The gear 25 is rotated until the first rack 23 and the second rack 24 move. The insert rod 4 is inserted into the insert holes 2111 on the upper and lower sides. The rotating rod 521 is rotated until the positioning rod 522 is inserted into the positioning hole 28. The limiting spring 53 pushes the limiting rod 51 to abut against one side of the first rack 23, thus locking the mold.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mold changing device for a blow molding machine, comprising a fixed mold plate (2) and a movable mold plate (3) disposed on the blow molding machine body (1), the fixed mold plate (2) and the movable mold plate (3) being distributed relative to each other, a fixed mold (21) being snapped onto the fixed mold plate (2), and a movable mold (31) being snapped onto the movable mold plate (3), characterized in that: The fixed template (2) is provided with a mold changing mechanism, which includes a rod (4) and a limiting member (5). The rod (4) is slidably installed on the fixed template (2). One end of the rod (4) is inserted and connected to one side of the fixed mold (21). The limiting member (5) is provided on the fixed template (2) and is used to limit and lock the position of the rod (4). The moving template (3) is provided with the same mold changing mechanism.

2. The mold changing device for a blow molding machine according to claim 1, characterized in that: The fixed mold (21) is provided with a card plate (211), and the fixed template (2) is provided with a card slot (22). The card plate (211) is connected to the fixed template (2) through the card slot (22). The card plate (211) is provided with an insertion hole (2111), and the insertion rod (4) is connected to the card plate (211) through the insertion hole (2111).

3. The mold changing device for a blow molding machine according to claim 2, characterized in that: The card plate (211) is provided in two pieces and is located at the top and bottom of the fixed mold (21) respectively. The insert rod (4) is provided in two pieces and is distributed parallel to each other. The insert rod (4) on both sides moves in opposite directions.

4. The mold changing device for a blow molding machine according to claim 3, characterized in that: The fixed template (2) is slidably installed with a first rack (23) and a second rack (24) that are parallel to each other. The first rack (23) and the second rack (24) are distributed opposite to each other. The insert rods (4) on both sides are respectively connected to one end of the first rack (23) and the second rack (24). A gear (25) is rotatably installed in the fixed template (2). The first rack (23) and the second rack (24) mesh with the gear (25) at opposite sides.

5. A mold changing device for a blow molding machine according to claim 4, characterized in that: The limiting component (5) includes a limiting rod (51) and a push rod (52). The limiting rod (51) is slidably installed on the fixed template (2). One side of the limiting rod (51) abuts against the end of the first rack (23) away from the insert rod (4). The push rod (52) is disposed at one end of the limiting rod (51). A limiting spring (53) is sleeved on the push rod (52). One end of the limiting spring (53) is connected to one end of the limiting rod (51).

6. The mold changing device for a blow molding machine according to claim 4, characterized in that: The second rack (24) is provided with a guide bar (241) on the side away from the insert rod (4). The guide bar (241) is slidably connected to the fixed template (2). An abutment spring (242) is sleeved on the guide bar (241).

7. A mold changing device for a blow molding machine according to claim 5, characterized in that: The push rod (52) is rotatably mounted with a rotating rod (521) at one end away from the limiting rod (51) and located on the outside of the fixed template (2). The rotating rod (521) rotates along the cross-sectional radius of the push rod (52). A positioning rod (522) is provided at one end of the rotating rod (52) away from the push rod (52) and located on one side facing the push rod (52). A positioning hole (28) is provided on the fixed template (2). The positioning rod (522) is inserted and connected to the fixed template (2) through the positioning hole (28).

8. The mold changing device for a blow molding machine according to claim 4, characterized in that: The gear (25) is coaxially connected to a rotating shaft (26), one end of which is located outside the fixed template (2), and a handwheel (27) is coaxially provided on the rotating shaft (26).

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