A high speed bottle preform special machine die set component

Abstract

The utility model relates to the field of injection molding machine discloses a high -speed bottle embryo special machine closes the mould component, including fixed mould plate, movable die plate and tail plate, is provided with the thrust seat between tail plate and movable die plate, is provided with the elbow mechanism between movable die plate, thrust seat and tail plate, is provided with the lock -on oil jar between tail plate and thrust seat, the elbow mechanism is non -self -locking crank mechanism, the lock -on oil jar is buffer oil jar, is provided with the ejection mechanism on movable die plate, the ejection mechanism includes the main top oil jar and auxiliary oil jar of synchronous top material and telescopic stroke one long one short, this mould closing component can significantly promote the opening and closing mould speed and the unloading speed, to promote the quality and efficiency of bottle embryo production.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machines, and in particular to a mold clamping component for a high-speed preform machine. Background Technology

[0002] Preform injection molding requires injection molding machines with rapid mold opening and closing capabilities for the following reasons: 1. To shorten the molding cycle and increase production capacity; 2. To ensure preform transparency and crystallization control; 3. To optimize mold life and stability; 4. To adapt to the seamless transition requirements of blow molding processes. Therefore, improving the opening and closing speed, precision, and stability of the mold closing components is essential.

[0003] Chinese Patent No. CN204398283U discloses a transmission clamping mechanism for a three-platen supercharged injection molding machine, which includes a fixed platen, a moving platen, and a tail plate. A toggle mechanism is provided between the tail platen and the moving platen. The toggle mechanism includes a long elbow arm, a short elbow arm, and a support rod. The opposite ends of the short elbow arm and the long elbow arm are hinged together, and the opposite ends of the two arms are respectively hinged to the tail platen and the moving platen. The two ends of the support rod are respectively hinged to the short elbow arm and a support plate connected to a clamping cylinder. The cylinder body of the clamping cylinder is mounted on the tail plate, and the end of the piston rod is fixedly connected to the center of the support plate.

[0004] Existing toggle mechanisms are all self-locking toggle mechanisms. They achieve a mechanical self-locking state by having a support rod perpendicular to the horizontal plane when the mold is closed, thus maintaining the closed state. However, this method slows down the mold opening speed, which is not suitable for the production of preforms that require faster mold opening and closing speeds. Therefore, it is necessary to design a high-speed preform machine mold closing component that can open and close molds quickly. Utility Model Content

[0005] This invention addresses the shortcoming that the opening and closing speed of existing three-platen injection molding machines cannot meet the speed required for preform production, and provides a high-speed preform-specific mold closing component that improves the opening and closing speed.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0007] A mold-closing component for a high-speed preform machine includes a fixed mold plate, a moving mold plate, and a tail plate. A thrust seat is provided between the tail plate and the moving mold plate. A toggle mechanism is provided between the moving mold plate, the thrust seat, and the tail plate. A mold-locking cylinder is provided between the tail plate and the thrust seat. The toggle mechanism is a non-self-locking crankshaft mechanism, and the mold-locking cylinder is a buffer cylinder.

[0008] The crankshaft mechanism using the above scheme includes a self-locking crankshaft mechanism and a non-self-locking crankshaft mechanism. The non-self-locking crankshaft mechanism can move freely in both directions and can maintain its motion state when the driving force and resistance are balanced, thus achieving rapid mold opening and closing. The mold locking cylinder adopts a buffer cylinder. When the moving platen moves flexibly under the action of the non-self-locking crankshaft mechanism, the buffer cylinder can reduce the time required for the entire mold closing process and achieve good mold locking performance through its own buffer braking. The combination of the above structures can significantly improve the speed of mold opening and closing, and improve the quality and efficiency of preform production.

[0009] Preferably, an ejection mechanism is provided on the moving template. The ejection mechanism includes a main ejection cylinder and an auxiliary cylinder that eject materials synchronously and have different lengths of extension and retraction.

[0010] Using the above scheme, the main ejector cylinder and the auxiliary cylinder participate in the first ejection action to ensure sufficient ejection force at the beginning so that the product can be separated from the mold. The main ejector cylinder also participates in the second ejection action to ensure that the product is ejected from the mold. This design can improve the unloading speed and further improve the production efficiency of bottle preforms.

[0011] Preferably, an auxiliary plate is integrally provided on the side of the moving template near the tail plate. The cylinder body of the main top cylinder is mounted on the auxiliary plate and the piston rod is inserted into the moving template. The cylinder body of the auxiliary cylinder is placed in the mounting groove of the moving template. The piston rod of the main top cylinder is directly opposite the center of the cavity and the end of the piston rod is equipped with an ejector rod. When the piston rods of the main top cylinder and the auxiliary cylinder retract, the end of the ejector rod is flush with the end of the piston rod of the auxiliary cylinder and does not extend beyond the side of the moving template near the fixed template.

[0012] By adopting the above scheme, the above settings can ensure that the ejector rod and the auxiliary cylinder can act synchronously on the product to perform the first ejection action, and the installation method of the main ejector cylinder can ensure that it can achieve the first ejection action and the second ejection action continuously.

[0013] Preferably, there are 2N (N≥1) auxiliary cylinders symmetrically distributed around the axis of the piston rod of the main cylinder.

[0014] Using the above scheme, 2N auxiliary cylinders are set and distributed symmetrically around the axis of the piston rod of the main top cylinder (which is also the center of the cavity), which can provide a stable ejection force for the product.

[0015] Preferably, the ejector rod is connected to the piston rod of the main ejector cylinder through the ejector guide plate. The ejector rod includes 2M (M≥1) uniform force ejector rods symmetrically distributed around the piston rod axis of the main ejector cylinder and / or a central ejector rod distributed coaxially with the piston rod of the main ejector cylinder. The moving template is provided with a clearance groove that runs through both sides and allows the ejector rod to pass through. The clearance groove is staggered from the installation groove.

[0016] By adopting the above scheme, an ejector guide plate is added to increase the number of ejector rods. Since there is friction between the product and the mold, the more ejector rods there are and the more evenly they are distributed during ejection, the more stable the product ejection will be and the lower the risk of product deformation. The ejector rods can be set with only a central ejector rod, or multiple uniform force ejector rods in addition to the central ejector rod, or a combination of central ejector rods and uniform force ejector rods. The optimal setting method is the combination of both, and the ejected product quality is the most stable.

[0017] Preferably, a mold adjustment mechanism for increasing mold clamping accuracy is provided on the tail plate, and the mold adjustment mechanism is an electric mold adjustment mechanism.

[0018] By adopting the above solution, the mold adjustment mechanism can be more adaptable, and the mold adjustment accuracy of the electric mold adjustment mechanism is higher.

[0019] Preferably, the moving template slides on the mold closing base, and the lower end of the moving template has mounting planes on both sides. Guide sliders are fixed on the mounting planes, and the mold closing base has a linear rail that extends towards the mold closing direction of the moving template and allows the guide sliders to be embedded and guided.

[0020] The above solution results in low friction between the linear guide and the guide slider, high running accuracy, and low energy consumption.

[0021] Preferably, the side wall of the moving template is provided with an oil supply hole for supplying hydraulic oil to the auxiliary cylinder.

[0022] This utility model, by adopting the above technical solutions, has significant technical effects: it improves upon conventional three-platen injection molding machines by using a non-self-locking crankshaft mechanism, a buffer cylinder for the mold-locking cylinder, and a main ejector cylinder and an auxiliary cylinder with different stroke lengths for the ejection mechanism. The non-self-locking crankshaft mechanism allows for bidirectional free movement, enabling rapid mold opening and closing. The buffer cylinder, through its own buffer braking, reduces the time required for the entire mold closing process and achieves good mold-locking performance. In the ejection mechanism, the main ejector cylinder and the auxiliary cylinder participate in the first ejection action, ensuring sufficient ejection force at the initial stage to allow the product to detach from the mold. The main ejector cylinder also participates in the second ejection action, ensuring the product is ejected from the mold. The combination of these structures significantly improves the speed of mold opening and closing, and enhances the quality and efficiency of preform production. Attached Figure Description

[0023] Figure 1 This is a front view of a mold-closing component of a high-speed preform machine according to this embodiment;

[0024] Figure 2 This is an isometric view of a mold-closing component of a high-speed preform machine according to this embodiment;

[0025] Figure 3 This is a front view of the moving template and tail plate in this embodiment.

[0026] Figure 4 This is an isometric view of the moving template and tail plate in this embodiment.

[0027] Figure 5 This is a front view of the main top cylinder and the top rod after assembly in this embodiment;

[0028] Figure 6 This is an isometric view of the main top cylinder and the top rod after assembly in this embodiment.

[0029] The parts referred to by the numbers in the above attached figures are as follows: 1. Fixed template; 2. Tie rod; 3. Moving template; 301. Oil inlet; 302. Mounting groove; 303. Clearance groove; 304. Auxiliary plate; 4. Main top cylinder; 5. Toggle mechanism; 501. First connecting rod; 502. Support rod; 503. Second connecting rod; 6. Tail plate; 7. Mold adjusting motor; 8. Buffer cylinder; 9. Drive gear ring; 10. Driven gear ring; 11. Guide slider; 12. Linear rail; 13. Auxiliary cylinder; 15. Thrust seat; 16. Ejection guide plate; 161. Guide hole; 17. Ejector rod; 171. Uniform force ejector rod; 172. Center ejector rod; 18. Guide rod. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0031] A mold clamping component for a high-speed preform machine, as described in the reference. Figures 1-2 As shown, it includes a fixed template 1, a movable template 3, and a tail plate 6 installed on a mold clamping base (not shown). The fixed template 1 is fixed on the mold clamping base, and the tail plate 6 is detachably fixed on the mold clamping base by fasteners (generally bolts and nuts). The movable template 3 is guided and slid on the mold clamping base, and the movable template 3 is movably connected to the tail plate 6 through a crankshaft mechanism.

[0032] A tie rod 2 is provided between the tail plate 6 and the fixed template 1. There are four tie rods 2 and they are distributed at the four corners of the fixed template 1 and the tail plate 6. One end of the tie rod 2 is fixedly connected to the fixed template 1 and the other end is screwed to the tail plate 6. The four corners of the moving template 3 are provided with through slots through which the tie rod 2 can pass.

[0033] Combination Figures 3-4As shown, the crankshaft mechanism adopts an existing non-self-locking crankshaft mechanism, including a first connecting rod 501 and a second connecting rod 503 with their ends hinged to each other. The opposite ends of the first connecting rod 501 and the second connecting rod 503 are respectively hinged to the tail plate 6 and the moving template 3. A thrust seat 15 is provided between the tail plate 6 and the moving template 3. A support rod 502 with both ends hinged to the thrust seat 15 and the first connecting rod 501 is provided between the thrust seat 15 and the first connecting rod 501. A mold-locking cylinder is provided in the center of the tail plate 6. The mold-locking cylinder is an existing buffer cylinder 8. The brand is Haixiong and the model is HXM218PET. The cylinder body of the buffer cylinder 8 is fixed on the side of the tail plate 6 away from the thrust seat 15 and its piston rod passes through the tail plate 6 and is fixedly connected to the center of the thrust seat 15.

[0034] The lower end of the moving template 3 has mounting planes on both sides. Guide sliders 11 are fixed on the mounting planes. Linear rails 12 are fixed parallel to the mold closing base so that the guide sliders 11 can be embedded and slid. The linear rails 12 extend along the mold closing direction.

[0035] An ejection mechanism is provided on the moving template 3, combined with Figures 3-6 As shown, the ejection mechanism includes a main ejection cylinder 4 and an auxiliary cylinder 13 with synchronous ejection and different stroke lengths. An auxiliary plate 304 is integrally formed on the side of the moving template 3 near the thrust seat 15. One main ejection cylinder 4 is provided, and the cylinder body is fixed on the auxiliary plate 304. An ejection guide plate 16 is fixed to the end of the piston rod of the main ejection cylinder 4. A guide rod 18 is fixedly connected between the auxiliary plate 304 and the moving template 3. Guide holes 161 are provided on both sides of the ejection guide plate 16 for the guide rod 18 to pass through. The ejection guide plate 16 slides between the auxiliary plate 304 and the moving template 3 guided by the guide rod 18. A central ejection rod 172 and eight uniform force ejection rods 171 are provided on the side of the ejection guide rod 18 near the moving template 3. The central ejection rod 172 is coaxially arranged with the piston rod of the main ejection cylinder 4 and is directly opposite the center of the product cavity. The uniform force ejection rods 171 are arranged at... The piston rod of the main top cylinder 4 is symmetrically distributed around its axis. The moving template 3 is provided with clearance grooves 303 that pass through both sides and allow the central top rod 172 and the uniform force top rod 171 to pass through. There are eight sets of auxiliary cylinders 13. On the side of the moving template 3 near the fixed template 1, there are eight mounting grooves 302 symmetrically distributed around the piston rod axis of the main top cylinder 4. Each mounting groove 302 is equipped with a set of auxiliary cylinders 13. The mounting grooves 302 and clearance grooves 303 are staggered. When the piston rods of the main top cylinder 4 and the auxiliary cylinders 13 retract, the ends of the uniform force top rod 171 and the central top rod 172 are flush with the ends of the piston rods of the auxiliary cylinders 13 and do not extend beyond the side of the moving template 3 near the fixed template 1. The side wall of the moving template 3 is provided with oil supply holes 301 for supplying hydraulic oil to the auxiliary cylinders 13.

[0036] A mold adjustment mechanism for increasing mold-locking accuracy is provided between the tail plate 6 and the tie rod 2, as shown in the reference. Figure 2As shown, the mold adjustment mechanism is an electric mold adjustment mechanism. The specific structure includes a driven gear ring 10 rotatably mounted on the tail plate 6 with the pull rod 2 as the center, a drive gear ring 9 rotatably mounted on the tail plate 6 and simultaneously meshing with four driven gear rings 10, and a mold adjustment motor 7 fixedly mounted on the tail plate 6 for driving the drive gear ring 9 to rotate. A drive gear that meshes with the drive gear ring 9 is coaxially fixed on the motor shaft of the mold adjustment motor 7. The driven gear ring 10 has a threaded through groove that is screwed to the threaded section of the pull rod 2. When adjusting the mold, the fasteners between the tail plate 6 and the mold closing base are loosened. By rotating the mold adjustment motor 7, the tail plate 6 is driven to move closer to or away from the fixed template 1 to adjust the mold closing distance between the moving template 3 and the fixed template 1, thereby increasing the adaptability of installing molds of different thicknesses.

[0037] The improvements in this solution are as follows: the crankshaft mechanism adopts a non-self-locking crankshaft mechanism, the mold-locking cylinder adopts a buffer cylinder 8, and the ejection mechanism adopts a main ejector cylinder 4 with one long stroke and an auxiliary cylinder 13 with one short stroke. The non-self-locking crankshaft mechanism can move freely in both directions, realizing rapid mold opening and closing; the buffer cylinder 8 reduces the time required for the entire mold closing process and achieves good mold-locking performance through its own buffer brake; in the ejection mechanism, the main ejector cylinder 4 and the auxiliary cylinder 13 participate in the first ejection action to ensure sufficient ejection force at the initial state, allowing the product to separate from the mold. The main ejector cylinder 4 also participates in the second ejection action to ensure that the product is ejected from the mold. The combination of the above structures can significantly improve the speed of mold opening and closing, and improve the quality and efficiency of preform production.

[0038] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A mold clamping component for a high-speed preform machine, comprising a fixed mold plate (1), a moving mold plate (3), and a tail plate (6), wherein a thrust seat (15) is provided between the tail plate (6) and the moving mold plate (3), a toggle mechanism (5) is provided between the moving mold plate (3), the thrust seat (15), and the tail plate (6), and a mold locking cylinder is provided between the tail plate (6) and the thrust seat (15), characterized in that: The elbow mechanism (5) is a non-self-locking crankshaft mechanism, and the mold-locking cylinder is a buffer cylinder (8).

2. The mold clamping component for a high-speed preform machine according to claim 1, characterized in that: An ejection mechanism is provided on the moving template (3). The ejection mechanism includes a main ejection cylinder (4) and an auxiliary cylinder (13) that eject materials synchronously and have different lengths of extension and retraction.

3. The mold clamping component for a high-speed preform machine according to claim 2, characterized in that: An auxiliary plate (304) is integrally provided on the side of the moving template (3) near the tail plate (6). The cylinder body of the main top cylinder (4) is installed on the auxiliary plate (304) and the piston rod is inserted into the moving template (3). The cylinder body of the auxiliary cylinder (13) is placed in the mounting groove (302) of the moving template (3). The piston rod of the main top cylinder (4) is directly opposite the center of the cavity and the end of the piston rod is equipped with a top rod (17). When the piston rods of the main top cylinder (4) and the auxiliary cylinder (13) retract, the end of the top rod (17) is flush with the end of the piston rod of the auxiliary cylinder (13) and does not extend beyond the side of the moving template (3) near the fixed template (1).

4. The mold clamping component for a high-speed preform machine according to claim 3, characterized in that: There are 2N (N≥1) auxiliary cylinders (13) symmetrically distributed around the axis of the piston rod of the main top cylinder (4).

5. The mold clamping component for a high-speed preform machine according to claim 4, characterized in that: The ejector rod (17) is connected to the piston rod of the main ejector cylinder (4) through the ejector guide plate (16). The ejector rod (17) includes 2M (M≥1) uniform force ejector rods (171) symmetrically distributed around the piston rod axis of the main ejector cylinder (4) and / or a central ejector rod (172) coaxially distributed with the piston rod of the main ejector cylinder (4). A clearance groove (303) is provided on the moving template (3) that passes through both sides and allows the ejector rod (17) to pass through. The clearance groove (303) is staggered from the mounting groove (302).

6. The mold clamping component for a high-speed preform machine according to claim 1, characterized in that: A mold adjustment mechanism for increasing mold clamping accuracy is provided on the tail plate (6). The mold adjustment mechanism is an electric mold adjustment mechanism.

7. The mold clamping component for a high-speed preform machine according to claim 1, characterized in that: The moving template (3) is guided to slide on the mold closing base. The lower end of the moving template (3) has mounting planes on both sides. A guide slider (11) is fixed on the mounting plane. A linear rail (12) is fixed on the mold closing base, extending towards the mold closing direction of the moving template (3) and allowing the guide slider (11) to be embedded and guided to slide.

8. The mold clamping component for a high-speed preform machine according to claim 1, characterized in that: The side wall of the moving template (3) is provided with an oil supply hole (301) for supplying hydraulic oil to the auxiliary cylinder (13).

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