Reverse-draw forming structure for water-cooled sizing jigs and water-cooled sizing jigs

Abstract

The utility model relates to oil tank production equipment technical field discloses a kind of for water-cooled sizing jigs, and the inverted buckle forming structure of water-cooled sizing jigs, the inverted buckle forming structure includes forming insert, slidingly connected on lower jigs, and the top is equipped with limiting groove;Pushing assembly, on the end face of upper jigs close to lower jigs, for when closing mould is stretched into limiting groove and contact pushing forming insert moves towards water-cooled jigs cavity direction;Reset component, it is set on lower jigs and is connected with forming insert, for when pushing assembly moves out of limiting groove to drive forming insert reset. The inverted buckle forming structure not only can avoid oil tank when water-cooled sizing, inverted buckle place bulging deformation, also help oil tank after process completion smoothly demoulding.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel tank production equipment, specifically to an undercut molding structure and a water-cooled shaping mold for a water-cooled shaping template. Background Technology

[0002] Because car fuel tanks are installed in a small space at the bottom of the vehicle, in order to accommodate the installation needs of surrounding components and pipelines, the fuel tank body needs to be equipped with a clearance structure in the corresponding position. At the same time, in order to meet the requirements of fuel storage capacity, this ultimately results in many inverted structures on the side of the fuel tank.

[0003] The fuel tank is formed by high-temperature blow molding. To ensure shrinkage rate and dimensional accuracy, manufacturers use high-pressure water cooling technology to achieve rapid cooling and shaping. Currently, the inverted structure on the water-cooling shaping mold used by manufacturers is fixedly connected to the mold. This can hinder the smooth insertion of the hot fuel tank into the water-cooling mold cavity, easily causing extrusion deformation during mold closing. Furthermore, after water cooling, it can also hinder the demolding of the cooled fuel tank, resulting in surface scratches. This not only makes it difficult to adapt to the needs of robotic assembly line production but also affects the appearance quality of the fuel tank product. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide an undercut molding structure and a water-cooled molding mold for water-cooled molding. This undercut molding structure can not only prevent the oil tank from bulging and deforming at the undercut point during water-cooled molding, but also help the oil tank to be demolded smoothly after the process is completed.

[0005] To achieve the above objectives, this utility model provides an undercut molding structure for a water-cooled shaping mold, comprising: A molding insert is slidably connected to the lower mold, and a limiting groove is provided on the top of the molding insert; A push assembly is disposed on the end face of the upper mold near the lower mold. The push assembly is used to extend into the limiting groove and contact and push the molding insert toward the water-cooled mold cavity during mold closing. A reset component, disposed on the lower template and connected to the molding insert, is used to drive the molding insert to reset when the push component moves out of the limiting groove.

[0006] Optionally, a wear-resistant block is provided in the limiting groove for contacting the push assembly during mold closing.

[0007] Optionally, the reset component includes: A reset rod, which passes through the molding insert along the moving direction of the molding insert and is connected to the lower mold. A spring is sleeved on one end of the reset rod that is connected to the lower template.

[0008] Optionally, the reset assembly further includes a limiting structure located at the end of the reset rod away from the lower template.

[0009] Optionally, the pushing component includes: The top block fixing seat is connected to the upper mold; A top block is provided on the top block fixing seat, and the end of the top block near the lower mold has a wedge-shaped surface.

[0010] Optionally, the undercut structure further includes: A guide groove is formed on the side of the molded insert and extends through the molded insert along the moving direction of the molded insert; The guide block is fixedly connected to the lower template and slidably engaged with the guide groove.

[0011] Optionally, two guide grooves and two guide blocks are provided. The two guide grooves are symmetrically opened on both sides of the molded insert, and each guide block slides in conjunction with the corresponding guide groove.

[0012] Optionally, the guide block is provided with an oil groove.

[0013] Optionally, the reset assembly is provided in two sets, and the two sets of reset assemblies are arranged in parallel and spaced apart on the lower template.

[0014] The second aspect of this utility model provides a water-cooled shaping mold, which includes an upper mold, a lower mold, and the aforementioned undercut forming structure.

[0015] Through the above technical solution, the molding insert in the undercut molding structure provided by this utility model adopts a movable design with sliding connection. When the mold is closed, the push component extends into the limiting groove and pushes the molding insert to move towards the water-cooled mold cavity to cooperate with the water-cooled mold cavity to form the undercut structure on the side of the oil tank. When the mold is opened, the push component moves out of the limiting groove along with the upper mold. At this time, the reset component drives the molding insert to retreat to the initial position, so that it is disengaged from the cooled and shaped oil tank undercut structure. This avoids the problems of large oil tank demolding resistance and surface scratches caused by the traditional fixed undercut structure being stuck with the oil tank, and improves the smoothness of oil tank demolding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the lower mold of a water-cooled shaping mold provided by this utility model; Figure 2 This is a schematic diagram of the upper mold of a water-cooled shaping mold provided by this utility model; Figure 3 This is a schematic diagram of the structure of the molded insert in this utility model; Figure 4 This is a schematic diagram of the structure of the jacking assembly in this utility model; Figure 5 This is a cross-sectional view of the inverted molding structure provided by this utility model after mold closing.

[0017] Explanation of reference numerals in the attached figures 1. Molding insert; 11. Limiting groove; 12. Guide groove; 2. Pushing assembly; 21. Top block fixing seat; 22. Top block; 23. Wedge-shaped surface; 3. Wear-resistant block; 4. Reset rod; 41. Limiting structure; 5. Spring; 6. Guide block; 10. Upper mold; 20. Lower mold; 30. Water-cooled mold cavity; Detailed Implementation The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0018] Combination Figure 1 and Figure 2 As shown, this utility model provides an undercut molding structure applied to a water-cooled shaping mold. The undercut molding structure mainly includes a molding insert 1, a push-up component 2, and a reset component.

[0019] Specifically, the molding insert 1 is slidably connected to the lower mold 20, and its top is provided with a limiting groove 11; the push assembly 2 is provided on the end face of the upper mold 10 near the lower mold 20, and the push assembly 2 is used to extend into the limiting groove 11 and contact and push the molding insert 1 towards the water-cooled mold cavity 30 when the mold is closed; the reset assembly is provided on the lower mold 20 and connected to the molding insert 1, and is used to drive the molding insert 1 to reset when the push assembly 2 moves out of the limiting groove 11.

[0020] In practical use, when the upper mold 10 and lower mold 20 are in mold-closing operation, the pusher component 2 gradually approaches the molding insert 1 as the upper mold 10 moves. As the mold-closing process continues, the pusher component 2 extends into the limiting groove 11 of the molding insert 1 and comes into close contact with the molding insert 1. Subsequently, under the continuous action of the mold-closing force, the pusher component 2 pushes the molding insert 1 towards the water-cooled mold cavity 30, so that the molding insert 1 reaches the predetermined molding position and cooperates with the water-cooled mold cavity 30 to form the undercut structure on the side of the oil tank. When the mold is opened, the upper mold 10 moves upward, and the pusher component 2 also gradually moves out of the limiting groove 11 of the molding insert 1. At this time, the reset component, by virtue of its stored elastic potential energy or through a specific mechanical structure, applies a reverse force to the molding insert 1, driving the molding insert 1 to slide away from the water-cooled mold cavity 30 and return to the initial position.

[0021] Understandably, when the undercut molding structure is in its initial position before mold closing, it will not interfere with the placement of the hot oil tank.

[0022] Furthermore, such as Figure 3 As shown, a wear-resistant block 3 is provided in the limiting groove 11 for contacting the ejector assembly 2 during mold closing. The wear-resistant block 3 in the limiting groove 11 ensures that the ejector assembly 2 directly contacts the wear-resistant block 3 during mold closing, instead of directly contacting the molding insert 1. This prevents the limiting groove 11 of the molding insert 1 from changing size due to wear, thus affecting the positioning accuracy of the ejector assembly 2 and the limiting groove 11.

[0023] In some embodiments, the wear-resistant block 3 can be made of a material with high hardness and good wear resistance, such as high-chromium cast iron or alloy steel.

[0024] In some embodiments, the wear-resistant block 3 is fixed in the limiting groove 11 using a detachable connection method. This facilitates the maintenance of the undercut structure and improves its service life.

[0025] In this utility model, such as Figure 5 As shown, the reset assembly includes a reset rod 4 and a spring 5. The reset rod 4 passes through the molding insert 1 along the moving direction of the molding insert 1 and is connected to the lower mold 20. The spring 5 is sleeved on one end of the reset rod 4 connected to the lower mold 20.

[0026] It is understandable that the connection between the reset rod 4 and the lower template 20 can be any appropriate method, as long as it is ensured that the reset rod 4 will not loosen or fall off during use, such as threaded connection, welding, etc.

[0027] In some embodiments, the spring 5 is made of a metal material with good elasticity and fatigue resistance, such as spring steel.

[0028] In some embodiments, the two ends of the spring 5 are connected to the lower mold 20 and the molding insert 1, respectively.

[0029] In practical use, when the mold opens, the spring 5, which is fitted onto the reset rod 4, stores a certain amount of elastic potential energy because it was compressed during the mold closing process. As the ejector assembly 2 moves out, the spring 5 begins to release its elastic potential energy, applying a thrust to the molding insert 1 in the opposite direction to the movement during mold closing. This causes the molding insert 1 to slide back to its initial position under the guidance of the reset rod 4.

[0030] Furthermore, the reset assembly also includes a limiting structure 41, which is located at the end of the reset rod 4 away from the lower mold 20, and is used to limit the movement stroke of the molding insert 1.

[0031] Understandably, the limiting structure 41 can be any suitable structure, as long as it effectively limits the travel of the molded insert 1. For example, a nut, a retaining ring, or a limiting block.

[0032] In this utility model, such as Figure 4 As shown, the push assembly 2 includes a push block fixing seat 21 and a push block 22. Specifically, the push block fixing seat 21 is connected to the upper mold 10; the push block 22 is disposed on the push block fixing seat 21, and the end of the push block 22 near the lower mold 20 has a wedge-shaped surface 23.

[0033] It is understandable that the connection between the top block fixing seat 21 and the upper mold 10 can be any suitable method, as long as the connection is firm and stable, so that the top block fixing seat 21 can move synchronously with the movement of the upper mold 10. For example, bolt connection, welding, etc.

[0034] The top block 22 and the top block fixing seat 21 can be connected by an integral connection, interference fit, slot connection or bolt fixing connection, as long as the top block 22 is accurately positioned on the top block fixing seat 21 and will not easily loosen.

[0035] Understandably, the angle and dimensions of the wedge-shaped surface 23 on the top block 22 need to be accurately designed to meet the positioning requirements of the molding insert 1 or wear-resistant block 3 during the mold closing process.

[0036] In this invention, in order to guide the horizontal movement of the molding insert 1 toward the water-cooled mold cavity 30 and limit its displacement in the mold closing direction, the undercut molding structure also includes a guide groove 12 and a guide block 6. Specifically, the guide groove 12 is opened on the side of the molding insert 1 and passes through the molding insert 1 along the moving direction of the molding insert 1; the guide block 6 is fixedly connected to the lower mold 20 and slides with the guide groove 12.

[0037] In some embodiments, the guide groove 12 is shaped as a rectangular groove, and the inner wall of the guide groove 12 is finely machined to ensure a smooth surface, so as to reduce the frictional resistance between the guide groove 12 and the guide block 6.

[0038] In some embodiments, the guide block 6 and the lower template 20 can be connected by bolts, welding, or integral molding. The shape of the guide block 6 matches the guide groove 12, and it can be set as a rectangular block with a size slightly smaller than that of the guide groove 12.

[0039] Furthermore, there are two guide grooves 12 and two guide blocks 6. The two guide grooves 12 are symmetrically opened on both sides of the forming insert 1, and each guide block 6 slides in conjunction with the corresponding guide groove 12.

[0040] The two guide grooves 12 and guide blocks 6, which are symmetrically distributed on both sides of the molding insert 1, can form a bidirectional constraint on the molding insert 1, thereby improving the stability and straightness of the sliding of the molding insert 1.

[0041] In some embodiments, to reduce frictional resistance and wear, an oil groove (not shown) is provided on the guide block 6. The oil groove on the guide block 6 continuously provides lubrication during the movement of the molding insert 1, reducing the frictional resistance between the guide block 6 and the guide groove 12, reducing direct contact and wear between the two, thereby extending the service life of the undercut molding structure and reducing the frequency of maintenance and replacement.

[0042] It is understood that the shape of the oil groove on the guide block 6 can be any suitable shape known to those skilled in the art, as long as it ensures that when the guide block 6 slides relative to the guide groove 12, it effectively stores and guides the lubricating oil to form a uniform oil film.

[0043] In this invention, two sets of reset components are provided, and the two sets of reset components are arranged in parallel and spaced apart on the lower template 20.

[0044] The two sets of reset components can guide the molding insert 1 to reset more smoothly, which helps to reduce molding errors caused by inaccurate reset, so that the size and shape of the undercut part of the product can meet the design requirements, ensure the molding accuracy and consistency of the product, and improve the quality level of the product.

[0045] In summary, the undercut molding structure provided by this utility model transforms the original fixed undercut structure of the mold into a movable insert, and incorporates a stroke limiting device. This prevents bulging of the undercut area during the water-cooling and shaping process in the oil tank, and the movable insert design ensures smooth product demolding after the water-cooling and shaping process is completed. It also facilitates the introduction of robots to grasp the product, reducing manual labor and improving overall work efficiency.

[0046] On the other hand, this utility model also provides a water-cooled shaping mold, which includes an upper mold 10, a lower mold 20, and the aforementioned undercut forming structure.

[0047] After the water-cooled molding die is closed, a receiving cavity that matches the shape of the oil tank is formed between the upper die 10 cavity and the lower die 20 cavity. The undercut molding structure matches the receiving cavity to form the undercut structure on the side of the oil tank.

[0048] In actual production, the operator places the oil tank into the water-cooled forming mold in the designated direction. After confirming the safety of the grating, the operator presses the start button. The upper mold 10 falls, and the push assembly 2, through the wear-resistant block 3, pushes the forming insert 1 horizontally to the designated position. The oil tank begins to be filled with water for cooling. After cooling is complete, the oil tank exits the water surface and exhausts air. The mold opens, the push assembly 2 disengages from the forming insert 1, and the spring 5 pushes the forming insert 1 to the limit structure 41 of the reset rod 4. The water-cooled forming mold ejection mechanism ejects the cooled oil tank product, and the worker removes the oil tank to complete production.

[0049] In this water-cooled forming mold, a molding insert 1, located on the side of the mold and capable of horizontally moving towards the mold cavity 30 and resetting, can meet the production requirements of fuel tanks with undercut structures on the side when the mold is closed. It also meets the fuel tank demolding requirements when the mold is opened, improving the undercut forming accuracy of the fuel tank within the mold. Furthermore, it facilitates automated production using robotic arms, reducing manual labor and improving work efficiency.

[0050] The water-cooled shaping mold provided by this utility model can meet the needs of robot one-line production and improve the appearance quality of fuel tank products.

[0051] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including the combination of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An undercut molding structure for a water-cooled shaping mold, characterized in that, include: A molding insert (1) is slidably connected to a lower mold (20), and a limiting groove (11) is provided on the top of the molding insert (1). The push assembly (2) is located on the end face of the upper mold (10) near the lower mold (20). The push assembly (2) is used to extend into the limiting groove (11) and contact and push the molding insert (1) towards the water-cooled mold cavity (30) when the mold is closed. A reset component, disposed on the lower template (20) and connected to the molding insert (1), is used to drive the molding insert (1) to reset when the push component (2) moves out of the limiting groove (11).

2. The undercut molding structure for a water-cooled shaping mold according to claim 1, characterized in that, The limiting groove (11) is provided with a wear-resistant block (3) for contacting the push assembly (2) when the mold is closed.

3. The undercut molding structure for a water-cooled shaping mold according to claim 1, characterized in that, The reset component includes: The reset rod (4) passes through the molding insert (1) along the moving direction of the molding insert (1) and is connected to the lower mold (20); A spring (5) is sleeved on the reset rod (4) and connected to one end of the lower template (20).

4. The undercut molding structure for a water-cooled shaping mold according to claim 3, characterized in that, The reset assembly also includes a limiting structure (41), which is located at the end of the reset rod (4) away from the lower template (20).

5. The undercut molding structure for a water-cooled shaping mold according to claim 1, characterized in that, The pushing assembly (2) includes: The top block fixing seat (21) is connected to the upper backing mold (10); A top block (22) is provided on the top block fixing seat (21), and the top block (22) has a wedge-shaped surface (23) at one end near the lower mold (20).

6. The undercut molding structure for a water-cooled shaping mold according to claim 1, characterized in that, The undercut molding structure also includes: A guide groove (12) is provided on the side of the molding insert (1) and extends through the molding insert (1) along the moving direction of the molding insert (1). The guide block (6) is fixedly connected to the lower mold (20) and slides in cooperation with the guide groove (12).

7. The undercut molding structure for a water-cooled shaping mold according to claim 6, characterized in that, Two guide grooves (12) and two guide blocks (6) are provided. The two guide grooves (12) are symmetrically opened on both sides of the molded insert (1). Each guide block (6) slides in cooperation with the corresponding guide groove (12).

8. The undercut molding structure for a water-cooled shaping mold according to claim 6, characterized in that, An oil groove is provided on the guide block (6).

9. The undercut molding structure for a water-cooled shaping mold according to claim 1, characterized in that, The reset assembly is provided in two sets, and the two sets of reset assemblies are arranged in parallel and spaced apart on the lower template (20).

10. A water-cooled shaping mold, characterized in that, The water-cooled shaping mold includes an upper mold (10), a lower mold (20), and an undercut forming structure as described in any one of claims 1-9.

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