Demolding mechanism for large elbow products
By designing the mold release mechanism of large-scale pipe bending products, using direct pumping and rotation design and wear-resistant block lubrication technology, the problem of difficult demolding of pipe bending products during injection molding is solved, and stable and strain-free removal is achieved Modular effect.
Patent Information
- Application Number
- CN202420287872.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-06
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-06
AI Technical Summary
It is difficult to release the mold smoothly during the injection molding process of pipe bending products. The existing mold release mechanism is not suitable for its circular shape and high tightening force, and there is a risk of strain marks on the surface of the product.
A mold release mechanism for large-scale bent pipe products is designed, adopting a direct pumping and rotational design, driving the extraction of the bent pipe rotary core through inclined guide columns and oil cylinders, combining the lubricating effect of the slider guide rails and wear-resistant blocks to ensure the product. Stable and smooth surfaces during demolding.
It realizes stable mold release of large-scale bent pipe products, avoids strain marks, and improves the smoothness and mold release efficiency of the product surface.
Smart Images
Figure CN222156504U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of injection molds, in particular to a demoulding mechanism for large-scale curved pipe products. Background Art
[0002] In the production of pipe bending products, product demoulding is always an important and thorny issue. Because it is different from other types of products. Non-pipe bending molds have demoulding mechanisms such as push rods, push plate demoulding mechanisms, pneumatic demoulding mechanisms, movable inserts or demoulding mechanisms combined with multiple mechanisms. However, these demoulding mechanisms are not suitable for demoulding mechanisms of pipe bending products. There are three reasons: 1. The shape of the product is different. Other types of products are not round, but open, while pipe bending products are round; 2. The mold structure is different: other types of products can use push rods, push plates, and pneumatic mold ejection structures, but pipe bending products use this structure, and the product cannot be demoulded smoothly.
[0003] There are four aspects of technical problems to be solved in demolding of bent pipe products: 1. To solve the appearance problem of the product, bent pipe products are mainly used in the fields of industry, civil water supply, chemical industry, chips, etc., which have high requirements on the surface of the product. The surface of the product must be smooth and there must be no scratches when demolding. 2. The materials of the products are different. The materials of pipe fittings are mostly PP, PVC, PFA, etc., and the products have strong clamping force. Other materials, such as ABS, PP, PS, etc. have weaker clamping force. 3. The structure of other products can be used for post-mold exit, while bent pipe products require the demolding mechanism to be able to rotate. Summary of the invention
[0004] The technical problem to be solved by the utility model is to provide a demoulding mechanism for large-sized bent pipe products which is stable during demoulding and can match large-sized bent pipe products.
[0005] The technical solution to achieve the purpose of the utility model is to provide a demoulding mechanism for large-scale bent pipe products, including a pull rod, an inclined guide column, a spring rod connecting plate, an oil cylinder, a slider guide rail, a bent pipe rotating core, a first slider baffle, a first slider seat, a first slider, a rear mold and a second slider seat;
[0006] The slider guide rail is installed on the rear mold, the second slider seat is arranged on the rear mold and can perform linear motion on the rear mold and the slider guide rail; the first slider seat is arranged on the rear mold, the first slider seat is connected with the first slider seat, and the axes of the first slider seat and the second slider seat are perpendicular; the first slider baffle is arranged on the rear mold and is located on the other side of the first slider;
[0007] The bending pipe rotating core is arranged on the rear mold core of the rear mold, one end of which is located at the second slider seat, and the other end of which is located at the first slider seat and connected to the first slider; the oil cylinder is transmission-connected to the second slider seat, and the spring rod connecting plate is connected to the first slider seat through the spring rod; the pull rod is connected between the spring rod connecting plate and the second slider seat and is pin-connected to the spring rod connecting plate and the second slider seat; the spring rod connecting plate is connected to the bending pipe rotating core; the inclined guide column is inclined to be higher on the left and lower on the right, one end of which is inserted into the corresponding inclined guide column groove provided on the upper end surface of the first slider seat, and the other end is installed on the front mold.
[0008] Furthermore, the demoulding mechanism of a large-scale bent pipe product also includes a rotating shaft and a second slider; the slider guide rail is installed at the rear of the rear mold through a fastener; the second slider seat is arranged at the left rear part of the upper end surface of the rear mold and faces forward; the first slider seat is arranged at the right front part of the upper end surface of the rear mold and faces left, the first slider is arranged on the left side of the first slider seat and is connected with the first slider seat so as to move together; the first slider baffle is installed on the rear mold and is located directly to the left of the first slider; the spring rod connecting plate is located on the right side of the first slider seat, and the spring rod connecting plate is located on the right side of the first slider seat. The plate is connected to the first slider seat by a pull rod, and the two ends of the pull rod are respectively connected to the spring rod connecting plate and the first slider seat through a rotating shaft pin, and the pull rod and the axis of the spring rod connecting plate and the first slider seat all have an included angle of 45 degrees; the second slider is arranged in front of the second slider seat and is connected to the second slider seat so as to move together; the bent pipe rotating core is respectively connected to the first slider and the second slider at its two ends, and the bent pipe rotating core is located at the center of one end on the first slider side, passes through the first slider and the first slider seat, and is connected to the spring rod connecting plate through fasteners.
[0009] Furthermore, the demoulding mechanism for large-scale bent pipe products further includes a cylinder fixing plate, a pressure strip and a second slider baffle;
[0010] The cylinder fixing plate is installed at the rear of the slider guide rail; the cylinder is installed on the cylinder fixing plate and is located at the rear of the cylinder fixing plate; the pressure strip is installed on the upper end surface of the slider guide rail through fasteners; the second slider baffle is installed on the rear mold and is located directly in front of the second slider; the power output shaft of the cylinder passes through the cylinder fixing plate and is connected to the keyway of the second slider seat for transmission connection.
[0011] Furthermore, the first slider baffle plate and the second slider baffle plate are in the shape of upper and lower halves, and the upper halves of the first slider baffle plate and the second slider baffle plate are mounted on the front mold.
[0012] Furthermore, the demoulding mechanism of the large-scale bent pipe product also includes a first shovel and a second shovel; the first shovel is installed on the front mold and is inserted into the first slider seat at an angle; the second shovel is installed on the front mold and is inserted into the second slider seat at an angle.
[0013] Furthermore, the demolding mechanism of the large bent pipe product also includes a wear-resistant block; the wear-resistant block is made of heat-treated material, has a higher hardness than the first slider, and has an oil groove on the upper end surface; the wear-resistant blocks are evenly spaced and arranged in the motion area of the first slider and the first slider seat on the right side of the upper end surface of the rear mold.
[0014] The utility model has positive effects: the demoulding mechanism of a large-scale curved pipe product of the utility model adopts a straight-drawing plus rotating demoulding design. Since the product has a 50 mm straight position at the big end of the curved pipe, the utility model first drives with an inclined guide column. When the front and rear molds are opened, the curved pipe rotating core is pulled out with the inclined guide column mechanism at a distance of 50 mm. Then, under the drive of the oil cylinder, the linear motion of the second slider drives the first slider to rotate, and all the curved pipe rotating cores inside the product are pulled out, so as to achieve the purpose of demoulding the product. The trajectory of the movement of the second slider must be limited by the pressure strip and the slider guide rail to ensure that the second slider will not deviate from the track due to gravity and inertia when moving, thereby ensuring the stability of the rotating motion of the first slider. A wear-resistant block is set on the bottom surface of the first slider, and an oil groove is processed on the wear-resistant block to play a wear-resistant and lubricating role. The demoulding mechanism solves the problem that large-scale curved pipe products are difficult to demould during injection molding production. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram (front view) of a demoulding mechanism for a large-scale bent pipe product of the utility model;
[0016] Figure 2 for Figure 1 A top view of
[0017] Figure 3 for Figure 1 AA section view.
[0018] The markings in the above drawings are as follows:
[0019] Rotating shaft 1, pull rod 2, inclined guide column 3, first shovel 4, spring rod connecting plate 5, cylinder 6, cylinder fixing plate 7, slider guide rail 8, pressure strip 9, bent pipe rotating core 10, first slider baffle 11, first slider seat 12, first slider 13, second slider 14, second slider baffle 15, second shovel 16, wear-resistant block 17, rear mold 18, second slider seat 19, product 20. DETAILED DESCRIPTION
[0020] (Example 1)
[0021] See Figures 1 to 3The demoulding mechanism of a large-scale bent pipe product of this embodiment includes a rotating shaft 1, a pull rod 2, an inclined guide column 3, a first scraper 4, a spring rod connecting plate 5, an oil cylinder 6, an oil cylinder fixing plate 7, a slider guide rail 8, a pressure strip 9, a bent pipe rotating core 10, a first slider baffle 11, a first slider seat 12, a first slider 13, a second slider 14, a second slider baffle 15, a second scraper 16, a wear-resistant block 17, a rear mold 18 and a second slider seat 19. The rear mold 18 is the main part of the mold, carrying the first slider seat 13, the second slider 14, the bent pipe rotating core 10 product and all the parts on the rear mold 18, with a water transport hole inside and a rear mold core installed on the upper end. The slider guide rail 8 is installed at the rear of the rear mold 18 through fasteners; the cylinder fixing plate 7 is installed at the rear of the slider guide rail 8; the cylinder 6 is installed on the cylinder fixing plate 7 and is located at the rear of the cylinder fixing plate 7; the pressure strip 9 is installed on the upper end surface of the slider guide rail 8 through fasteners, and the pressure strip 9 plays a role in guiding the movement of the second slider 14 and the second slider seat 19.The second slider seat 19 is arranged at the left rear part of the upper end surface of the rear mold 18 and faces forward, the second slider 14 is arranged in front of the second slider seat 19 and is connected with the second slider seat 19 so as to move together; the second slider baffle 15 is installed on the rear mold 18 and is located directly in front of the second slider 14; the first slider seat 12 is arranged at the right front part of the upper end surface of the rear mold 18 and faces left, the first slider 13 is arranged on the left of the first slider seat 12 and is connected with the first slider seat 12 so as to move together; the first slider baffle 11 is installed on the rear mold 18 and is located on the left side of the first slider 13; the spring rod connecting plate 5 is connected to the first slider seat 12 through the spring rod and is located on the right side of the first slider seat 12. The spring rod connecting plate 5 and the first slider seat 12 are connected through the pull rod 2, and the two ends of the pull rod 2 are respectively connected to the spring rod connecting plate 5 and the first slider seat 12 through the rotating shaft 1 pin, and the pull rod 2 and the spring rod connecting plate 5 and the first slider seat 12 have an included angle of 45 degrees; the power output shaft of the oil cylinder 6 passes through the oil cylinder fixing plate 7 The second slider seat 19 is connected to the second slider seat 19 by a keyway, and the transmission connection can make the second slider seat 19 move forward and backward in a straight line; the curved tube rotating core 10 is connected to the first slider 13 and the second slider 14 at its two ends, and the central end of the curved tube rotating core 10 located on the side of the first slider 13 passes through the first slider 13 and the first slider seat 12 and is connected to the spring rod connecting plate 5 through a fastener; the inclined guide column 3 is tilted and arranged with the left side higher and the right side lower, one end of which is inserted into the corresponding inclined guide column groove provided on the upper end surface of the first slider seat 12, and the other end is installed on the front mold ; The first shovel 4 is installed on the front mold, and cooperates with the first slider seat 12 to be inserted obliquely for positioning the first slider seat 12 during injection molding; the second shovel 16 is installed on the front mold, and cooperates with the second slider seat 19 to be inserted obliquely for positioning the second slider seat 19 during injection molding; the wear-resistant block 17 is made of heat-treated material, and its hardness is higher than that of the first slider 13. An oil groove is provided on the upper end surface for lubrication. The wear-resistant blocks 17 are evenly spaced and arranged in the motion area of the first slider 13 and the first slider seat 12 on the right part of the upper end surface of the rear mold 14.
[0022] Preferably, the first slider baffle 11 and the second slider baffle 12 are in the shape of two halves, the upper halves of which are installed on the front mold and detach from the rear mold 18 when the front mold is opened, and the product is blocked by the lower halves of the first slider baffle 11 and the second slider baffle 12.
[0023] When the demoulding mechanism of the large curved pipe products of this embodiment is used, under the drive of the injection molding machine's mold clamping mechanism oil cylinder, the front and rear molds and the slider are reset, the mold is closed, and the injection molding machine continues high-pressure mold locking to prepare for the injection filling action. After the injection molding machine completes the injection, the mold cooling system starts to operate, the cooling water starts to circulate in the mold, the mold temperature starts to drop, and the product starts to solidify from the molten state. When the product is solidified and formed, the mold is ready to open. When the front and rear molds are opened, the inclined guide column 3 on the front mold and the spring rod of the spring rod connecting plate 5 drive the first slider seat 12 and the first slider 13 to start moving to the right for a straight line distance, usually 50 mm. At this time, the first slider baffle 11 does not move, blocking the product 20, ensuring that the product 20 does not move with the first slider 13 and stays in the original position. After the linear motion of the first slider 13 stops, the cylinder 6 starts to start the backward linear motion. At the same time, the cylinder 6 drives the first slider seat 12 and the first slider 13 to start moving around the rotation axis 1. The rotation axis 1 is connected to the first slider seat 12 through the pull rod 2. The pull rod 2 drives the first slider 13 to completely separate the bent pipe rotating core 10 from the mold core and the product 20. The first slider baffle 11 is fixed on the rear mold 18 to block the product 20 from moving. The bent pipe rotating core 10 is separated from the product 20, thereby achieving the purpose of product demolding.
[0024] Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.
Claims
1. A demoulding mechanism for large-scale bent pipe products, characterized by: It includes a pull rod, an inclined guide column, a spring rod connecting plate, an oil cylinder, a slider guide rail, a curved pipe rotating core, a first slider baffle, a first slider seat, a first slider, a rear mold and a second slider seat; The slider guide rail is installed on the rear mold, the second slider seat is arranged on the rear mold and can perform linear motion on the rear mold and the slider guide rail; the first slider seat is arranged on the rear mold, the first slider seat is connected with the first slider seat, and the axes of the first slider seat and the second slider seat are perpendicular; the first slider baffle is arranged on the rear mold and is located on the other side of the first slider; The bending pipe rotating core is arranged on the rear mold core of the rear mold, one end of which is located at the second slider seat, and the other end of which is located at the first slider seat and connected to the first slider; the oil cylinder is transmission-connected to the second slider seat, and the spring rod connecting plate is connected to the first slider seat through the spring rod; the pull rod is connected between the spring rod connecting plate and the second slider seat and is pin-connected to the spring rod connecting plate and the second slider seat; the spring rod connecting plate is connected to the bending pipe rotating core; the inclined guide column is inclined to be higher on the left and lower on the right, one end of which is inserted into the corresponding inclined guide column groove provided on the upper end surface of the first slider seat, and the other end is installed on the front mold.
2. The demoulding mechanism for large-sized curved pipe products according to claim 1, characterized in that: The tool holder also includes a rotating shaft and a second slider; the slider guide rail is installed at the rear of the rear mold by fasteners; the second slider seat is arranged at the left rear part of the upper end surface of the rear mold and faces forward; the first slider seat is arranged at the right front part of the upper end surface of the rear mold and faces left, the first slider is arranged at the left side of the first slider seat and is connected with the first slider seat so as to move together; the first slider baffle is installed on the rear mold and is located directly to the left of the first slider; the spring rod connecting plate is located to the right of the first slider seat, the spring rod connecting plate and the first slider seat are connected by a pull rod, and the two ends of the pull rod are respectively connected to the spring rod connecting plate and the first slider seat by a rotating shaft pin, and the pull rod and the spring rod connecting plate and the axis of the first slider seat all have an angle of 45 degrees; the second slider is arranged in front of the second slider seat and is connected with the second slider seat so as to move together; the bent pipe rotating core is connected to the first slider and the second slider at its two ends respectively, and the bent pipe rotating core is located at the center of one end of the first slider side and passes through the first slider and the first slider seat and is connected to the spring rod connecting plate by fasteners.
3. The demoulding mechanism for large-sized curved pipe products according to claim 2, characterized in that: It also includes a cylinder fixing plate, a pressure strip and a second slider baffle; The cylinder fixing plate is installed at the rear of the slider guide rail; the cylinder is installed on the cylinder fixing plate and is located at the rear of the cylinder fixing plate; the pressure strip is installed on the upper end surface of the slider guide rail through fasteners; the second slider baffle is installed on the rear mold and is located directly in front of the second slider; the power output shaft of the cylinder passes through the cylinder fixing plate and is connected to the keyway of the second slider seat for transmission connection.
4. The demoulding mechanism for large-sized curved pipe products according to claim 3 is characterized in that: The first slider baffle plate and the second slider baffle plate are in the shape of upper and lower halves, and the upper halves of the first slider baffle plate and the second slider baffle plate are mounted on the front mold.
5. The demoulding mechanism for large-sized curved pipe products according to claim 2, characterized in that: It also includes a first shovel and a second shovel; the first shovel is installed on the front mold and is inserted into the first slider seat obliquely; the second shovel is installed on the front mold and is inserted into the second slider seat obliquely.
6. The demoulding mechanism for large-sized curved pipe products according to claim 2, characterized in that: It also includes a wear-resistant block; the wear-resistant block is made of heat-treated material, has a harderness higher than that of the first slider, and has an oil groove on the upper end surface; the wear-resistant blocks are evenly spaced and arranged in the motion area of the first slider and the first slider seat on the right part of the upper end surface of the rear mold.