Plastic part compression molding model of linear guide rail pair
The automatic demolding and resetting mechanism, driven by a cylinder-driven pressure plate and hook spring, solves the problems of uneven demolding and inconvenient resetting in traditional compression molding, thus improving production efficiency and molding quality.
Patent Information
- Application Number
- CN202520165002.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing compression molding models require manual demolding and lack an automatic reset mechanism, which increases production time and costs, causes uneven demolding, and affects the quality of molded parts.
A compression molding model for plastic parts with linear guide rails was designed. The pressure plate is driven by a cylinder to slide, and automatic demolding is achieved through a hook rod and spring mechanism. After demolding, the part automatically resets. The occupant device slides and resets within the cavity shell, thus realizing automated demolding and reset.
It achieves automated demolding without human intervention, improving production efficiency and molding consistency, reducing manual adjustment time and costs, and ensuring the stability and precision of molded parts.
Smart Images
Figure CN223918461U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of guide rail parts manufacturing technology, specifically to a compression molding model of a plastic part for a linear guide rail pair. Background Technology
[0002] Plastic guide rails are typically made of high-performance engineering plastics, such as ultra-high molecular weight polyethylene (UHMWPE) and polytetrafluoroethylene (PTFE). These materials possess excellent chemical stability and can resist the erosion of various chemicals, including acids, alkalis, salts, and organic solvents. Since different areas in chemical production processes may have different chemical environments, plastic guide rails can adapt to various complex chemical conditions without requiring additional anti-corrosion treatment, reducing maintenance costs and equipment replacement frequency. The guide rail pair mainly consists of sliders, balls, and tracks. Because compression molding has a relatively short cycle compared to other manufacturing methods, compression molding is commonly used when manufacturing sliders. Traditional compression molding molds usually require manual demolding, which not only increases labor intensity but also easily leads to uneven demolding and damage to the molded parts. Existing compression molding molds lack an effective reset mechanism; the occupant cannot automatically return to its initial position after demolding, requiring manual adjustment, which increases production time and costs. Utility Model Content
[0003] The purpose of this invention is to provide a compression molding model of a plastic part for a linear guide pair, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, a compression molding model for a linear guide pair of plastic parts is provided, including a second base, a cavity shell fixedly mounted on the top of the second base, an injection port on the top of the cavity shell, molten plastic being injected into the cavity shell through the injection port for shaping, a compression device being provided on one side of the cavity shell, the compression device sliding into the cavity shell to compress the molten plastic inside the cavity shell, a placeholder device being provided on one side of the compression device, the placeholder device being located inside the cavity shell, the placeholder device occupying space inside the cavity shell, so that the solidified plastic part retains the hole position, after the plastic part is formed, the compression device sliding away from the placeholder device and driving the placeholder device to slide, pulling the formed plastic part out of the cavity shell, a first base being provided on the side of the second base away from the placeholder device, when the compression device interacts with the first base, the compression device releases the placeholder device, the placeholder device sliding back into the cavity shell.
[0005] As a further improvement to this technical solution, the compression molding device includes a pressure plate disposed on the side of the cavity shell near the first base. The pressure plate slides into the cavity shell to extrude molten plastic. The occupant device includes a track occupant core disposed inside the cavity shell. Ball occupant cores are disposed on both sides of the track occupant core. The molten plastic inside the cavity shell encounters the track occupant core and the ball occupant core and solidifies to form a hole.
[0006] As a further improvement to this technical solution, the pressure plate is provided with two pairs of hook rods on the side near the first base. Each hook rod in each pair is arranged vertically. A pin is fixedly connected to the end of the ball bearing occupant near the first base. The pin passes through a sliding hole opened on the side wall of the pressure plate. A locking head is fixedly connected to the end of the pin near the first base. The two hook rods arranged vertically engage the locking head passing through the sliding hole. The pressure plate slides towards the side near the first base. The two pairs of hook rods drive the two locking heads and the pin to slide, causing the two ball bearing occupants to slide towards the first base and pull the formed plastic part out of the cavity shell.
[0007] As a further improvement to this technical solution, a drive rod is fixedly connected to the side of the pressure plate near the first base. A cylinder is fixedly installed above the first base, and the piston rod of the cylinder is connected to the drive rod. A connecting plate is fixedly installed above the drive rod, and the connecting plate has a slot opening downwards. Two first connecting rods are fixedly connected to the lower end of the connecting plate, and a second connecting rod is fixedly connected to the end of the first connecting rod away from the first base. The middle section of each hook rod in each pair is respectively hinged to the upper and lower ends of the second connecting rod. A first spring is installed between the two hook rods. The first spring keeps the two hook rods horizontal. When the locking head passes between the two hook rods, it drives the two hook rods to swing around the hinge point. The first spring restores the two hook rods to a horizontal state.
[0008] As a further improvement to this technical solution, a blocking plate is fixedly connected to the end of the track occupant core away from the first base. Two track occupant cores are fixedly installed on the blocking plate. The blocking plate seals the end of the cavity shell away from the pressure plate. A square rod is fixedly connected to the side of the blocking plate away from the first base. A reset sleeve is fixedly connected to the middle section of the square rod. A second reset spring is sleeved on the square rod between the blocking plate and the reset sleeve. After the hook rod pulls the ball occupant core towards the first base, the second reset spring pushes the reset sleeve away from the first base. Through the square rod and the blocking plate, the track occupant core and the ball occupant core slide away from the first base and return to the inside of the cavity shell.
[0009] As a further improvement to this technical solution, vertical rods are fixedly installed on both sides of the cylinder. Two guide slides arranged vertically are fixedly installed on the upper end of the vertical rods. The ends of the two guide slides near the cavity shell are both set in an outward flared shape. When the two hook rods slide between the two guide slides, the two guide slides press the two hook rods in the middle, press the first spring, and drive the ends of the two hook rods away from the guide slides to move away from each other. Under the pull of the second return spring, the locking head disengages from between the two hook rods and drives the ball bearing occupant core and the track occupant core to slide into the cavity shell.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0011] In the compression molding model of the plastic part of this linear guide pair, the pressure plate is driven by a cylinder to slide, which moves the hook rod and engages with the locking head. Under the pull of the second return spring, the occupant device disengages from the plastic part. This process is fully automated demolding without manual intervention, improving production efficiency and consistency. After demolding, two guide slides squeeze the two hook rods, causing them to release their engagement with the locking head. This allows the occupant device to automatically return to its initial position after demolding. This automatic reset mechanism not only reduces the time and cost of manual adjustment but also improves the recycling efficiency of the model and ensures the consistency of each molding. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0013] Figure 2 This is a schematic cross-sectional view of the cavity shell of the utility model.
[0014] Figure 3 This is a schematic diagram of the compression molding device for a utility model.
[0015] Figure 4 This is a schematic diagram of the occupant device structure of a utility model;
[0016] Figure 5 This is an enlarged structural schematic diagram of point A of the utility model.
[0017] The meanings of the labels in the diagram are as follows:
[0018] 1. Compression molding device; 11. Pressure plate; 12. Drive rod; 13. Connecting plate; 14. First connecting rod; 15. Second connecting rod; 16. Hook rod; 17. First spring; 18. Sliding hole;
[0019] 2. Occupant device; 21. Track occupant core; 22. Ball bearing occupant core; 221. Pin; 222. Locking head; 23. Blocking plate; 24. Square rod; 25. Reset sleeve; 26. Second reset spring;
[0020] 3. Cylinder; 41. First base; 42. Second base; 51. Vertical rod; 52. Guide slide plate; 6. Cavity shell. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0023] Example 1
[0024] Please see Figures 1-5As shown, this embodiment provides a compression molding model for a linear guide pair of plastic parts, including a second base 42. A cavity shell 6 is fixedly installed above the second base 42. An injection port is provided on the top of the cavity shell 6. Molten plastic is injected into the cavity shell 6 through the injection port for shaping. The internal space is used to accommodate the molten plastic. The design of the injection port allows the molten plastic to be smoothly injected into the cavity shell 6 for forming. The precise design of this component ensures the accuracy of the shape and size of the plastic parts and improves production efficiency. A compression molding device 1 is provided on one side of the cavity shell 6. The compression molding device 1 slides into the cavity shell 6 and squeezes the molten plastic inside the cavity shell 6, ensuring that the molten plastic can fully fill every detail of the model during the molding process. By squeezing the plastic, the density and strength of the molding can be improved, ensuring the performance of the final product. A positioning device 2 is provided on one side of the second base 42, which is located inside the cavity shell 6. The positioning device 2 occupies a position inside the cavity shell 6, so that the solidified plastic part retains the hole position. This design not only improves the functionality of the molded part, but also simplifies the subsequent processing steps, saving time and cost. After the plastic part is formed, the compression molding device 1 slides away from the positioning device 2 and drives the positioning device 2 to slide, pulling the molded plastic part out of the cavity shell 6, ensuring the smooth removal of the molded part and improving production efficiency. A first base 41 is provided on the side of the second base 42 away from the positioning device 2. When the compression molding device 1 interacts with the first base 41, the compression molding device 1 releases the positioning device 2, and the positioning device 2 slides back into the cavity shell 6. This step prepares for the subsequent compression molding process and improves the continuity of production.
[0025] The compression molding device 1 includes a pressure plate 11 disposed on the side of the cavity shell 6 near the first base 41. The pressure plate 11 slides into the cavity shell 6 to extrude molten plastic. This extrusion process not only improves the fluidity of the plastic but also ensures the uniform distribution of the plastic inside the mold, thereby improving the quality and precision of the finished product. The positioning device 2 includes a track positioning core 21 disposed inside the cavity shell 6. Ball positioning cores 22 are disposed on both sides of the track positioning core 21. When the molten plastic inside the cavity shell 6 encounters the track positioning core 21 and the ball positioning core 22 and solidifies, it forms a hole, ensuring the accuracy of the size and shape of the hole after the plastic part is formed, thereby enhancing the functionality and reliability of the part.
[0026] Two pairs of hook rods 16 are provided on the side of the pressure plate 11 near the first base 41. Each hook rod 16 in each pair is arranged vertically. The two pairs of hook rods 16 are symmetrically arranged to pull the two sides of the plastic part simultaneously, thereby making the plastic part more stable during sliding and reducing deformation caused by asymmetrical force. This design allows the pressure plate 11 to stably drive the ball bearing holder 22 to move during sliding, ensuring smooth demolding of the molded part. A pin 221 is fixedly connected to the end of the ball bearing holder 22 near the first base 41. The pin 221 passes through the sliding hole 18 opened on the side wall of the pressure plate 11. A locking head 222 is fixedly connected to one end near the first base 41. Two hook rods 16 arranged vertically engage the locking head 222 that passes through the sliding hole 18. The pressure plate 11 slides towards the side closer to the first base 41. The two pairs of hook rods 16 drive the two locking heads 222 and the pins 221 to slide, causing the two ball bearing spacers 22 to slide towards the first base 41 and pull the molded plastic part out of the cavity shell 6. This process not only achieves smooth demolding of the molded part, but also prevents disengagement during the pulling process through the engaging design of the hook rods 16 and the locking head 222, ensuring the stability and reliability of the demolding process and improving production efficiency and molding quality.
[0027] A drive rod 12 is fixedly connected to the side of the pressure plate 11 near the first base 41. A cylinder 3 is fixedly installed above the first base 41. The piston rod of the cylinder 3 is connected to the drive rod 12. The cylinder 3 pushes the drive rod 12 through the piston rod, thereby driving the pressure plate 11 to slide into the cavity shell 6 to extrude molten plastic. This design not only provides a stable power source but also ensures precise control of the compression molding process, improving the molding quality. A connecting plate 13 is fixedly installed above the drive rod 12. The connecting plate 13 has a slot opening downwards. Two first connecting rods 14 are fixedly connected to the lower end of the connecting plate 13. A second connecting rod 15 is fixedly connected to the end of the first connecting rod 14 away from the first base 41. The design of the connecting plate 13 and the first connecting rods 14 ensures the stability and straightness of the pressure plate 11 during the sliding process, reduces errors during the movement process, and improves the molding accuracy. The middle section of each hook rod 16 in each pair is hinged to the upper end of the second connecting rod 15. At the lower end, a first spring 17 is installed between the two hook rods 16. The first spring 17 keeps the two hook rods 16 horizontal. The cooperation between the hook rods 16 and the first spring 17 not only ensures the stable positioning of the occupant device 2 during the forming process, but also drives the occupant device 2 to move during demolding by swinging the hook rods 16, thus realizing the smooth demolding of the formed part. The design of the first spring 17 allows the hook rods 16 to automatically return to the horizontal state after demolding, improving the recycling efficiency of the model. When the locking head 222 passes between the two hook rods 16, it drives the two hook rods 16 to swing around the hinge point. The first spring 17 restores the two hook rods 16 to the horizontal state. This process not only realizes the smooth demolding of the formed part, but also ensures that the hook rods 16 can automatically return to the initial position after demolding through the reset action of the first spring 17, preparing for the next forming. This design not only improves the stability and reliability of demolding, but also reduces manual intervention, production costs and labor intensity.
[0028] A blocking plate 23 is fixedly connected to the end of the track occupant core 21 away from the first base 41. Two track occupant cores 21 are fixedly installed on the blocking plate 23. The blocking plate 23 seals the end of the cavity shell 6 away from the pressure plate 11. The blocking plate 23 not only fixes the track occupant cores 21 but also seals the cavity shell 6, preventing molten plastic from overflowing from the other end of the cavity shell 6, ensuring the smooth progress of the molding process and improving the molding quality. A square rod 24 is fixedly connected to the side of the blocking plate 23 away from the first base 41. A reset sleeve 25 is fixedly connected to the middle section of the square rod 24. A second reset spring 26 is sleeved on the square rod 24 between the blocking plate 23 and the reset sleeve 25. The design of the square rod 24 and the reset sleeve 25 provides guidance and support for the reset of the occupant device 2, ensuring… To ensure the stability and accuracy of the reset process, the second reset spring 26 is sleeved on the square rod 24, providing elastic force for the reset of the occupant device 2, enabling it to automatically return to its initial position after demolding, thus improving the recycling efficiency of the model. After the hook rod 16 pulls the ball occupant core 22 towards the first base 41, the second reset spring 26 pushes the reset sleeve 25 away from the first base 41. Through the square rod 24 and the blocking plate 23, the track occupant core 21 and the ball occupant core 22 slide away from the first base 41 and return to the interior of the cavity shell 6. This not only achieves smooth demolding of the formed parts, but also ensures that the occupant device 2 can automatically return to its initial position after demolding through the reset action of the second reset spring 26, preparing for the next molding.
[0029] Vertical rods 51 are fixedly installed on both sides of cylinder 3. Two guide slides 52, arranged vertically, are fixedly installed on the upper end of the vertical rods 51. The ends of the two guide slides 52 closest to the cavity shell 6 are both designed in an outward-flaring trumpet shape. The design of the vertical rods 51 and guide slides 52 provides precise guidance for the sliding of the compression molding device 1 and the positioning device 2, ensuring the straightness and coaxiality of each component during movement. The trumpet-shaped guide slides 52 not only facilitate the sliding of the hook rods 16 but also compress the hook rods 16 during sliding, ensuring a smooth demolding process. When the two hook rods 16 slide between the two guide slides 52, the two guide slides 52 compress the two hook rods 16 towards the center, compressing the first spring 17 and causing the ends of the two hook rods 16 away from the guide slides 52 to move away from each other. The process involves guiding the sliding plate 52 to press the hook rod 16, causing the hook rod 16 to swing around the hinge point, thereby releasing the locking head 222 in the occupant device 2. The design of the first spring 17 ensures the stability and reset capability of the hook rod 16 during the pressing process, improving the reliability and efficiency of demolding. Under the pull of the second reset spring 26, the locking head 222 disengages from between the two hook rods 16 and drives the ball occupant core 22 and the track occupant core 21 to slide into the cavity shell 6. The elastic force of the second reset spring 26 not only enables the occupant device 2 to automatically return to the initial position after demolding, but also ensures the stability and reliability of the entire demolding process. This design not only improves the demolding efficiency, but also reduces manual intervention, lowers production costs and labor intensity, and improves the recycling efficiency of the mold.
[0030] In this embodiment, the linear guide pair plastic part compression molding model is used such that molten plastic is injected into the cavity shell 6 through the injection port above the cavity shell 6 for shaping. This process not only ensures that the plastic can fill the cavity evenly, but also ensures the dimensional accuracy and surface quality of the molded plastic part. The cylinder 3 pushes the drive rod 12 through the piston rod, thereby driving the pressure plate 11 to slide into the cavity shell 6 to extrude the molten plastic. The design of the connecting plate 13 and the first connecting rod 14 ensures the stability and straightness of the pressure plate 11 during the sliding process, reduces errors during the movement process, and improves the molding accuracy. The track occupant core 21 and the ball bearing occupant core 22 are used in conjunction with the linear guide pair plastic part compression molding model. The core 22 corresponds to the shape and position of the track and ball in the linear guide pair, ensuring that the molded plastic part can accurately cooperate with other components of the linear guide pair. The two pairs of hook rods 16 drive the two locking heads 222 and pins 221 to slide, causing the two ball occupant cores 22 to slide towards the first base 41 and pull the molded plastic part out of the cavity shell 6, realizing the smooth demolding of the molded part. The square rod 24 and the blocking plate 23 cause the track occupant core 21 and the ball occupant core 22 to slide away from the first base 41 and return to the cavity shell 6, preparing for the next molding and improving the recycling efficiency of the model.
[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A compression molding model for a linear guide pair of plastic parts, comprising a second base (42), a cavity shell (6) fixedly mounted above the second base (42), an injection port being provided above the cavity shell (6), molten plastic being injected into the cavity shell (6) through the injection port for molding, and a compression molding device (1) being provided on one side of the cavity shell (6), the compression molding device (1) sliding into the cavity shell (6) to extrude the molten plastic inside the cavity shell (6), characterized in that: The side of the compression molding device (1) is provided with a placeholder device (2), the placeholder device (2) is arranged in the inside of the cavity shell (6), the placeholder device (2) occupies the inside of the cavity shell (6), the placeholder device (2) occupies the inside of the cavity shell (6), the solidified plastic part is reserved, the plastic part is shaped, the compression molding device (1) slides away from the placeholder device (2) and drives the placeholder device (2) to slide, the shaped plastic part is pulled out from the inside of the cavity shell (6), the second base (42) is provided with a first base (41) on the side away from the placeholder device (2), when the compression molding device (1) interacts to be close to the first base (41), the compression molding device (1) releases the placeholder device (2), and the placeholder device (2) slides back to the inside of the cavity shell (6).
2. The plastic part compression mold model of a linear guide rail pair according to claim 1, characterized in that: The compression molding device (1) includes a pressing plate (11) arranged on one side of the cavity shell (6) close to the first base (41), the pressing plate (11) slides to the inside of the cavity shell (6) to extrude the molten plastic, the placeholder device (2) includes a track placeholder core (21) arranged in the inside of the cavity shell (6), both sides of the track placeholder core (21) are provided with a ball placeholder core (22), and the molten plastic in the inside of the cavity shell (6) encounters the track placeholder core (21) and the ball placeholder core (22) and solidifies to form a hole position.
3. The compression molded model of a plastic part of a linear guide rail pair according to claim 2, characterized in that: The side of the pressing plate (11) close to the first base (41) is provided with two pairs of hook rods (16), each hook rod (16) in each pair of hook rods (16) is arranged in an upper and lower manner, one end of the ball placeholder core (22) close to the first base (41) is fixedly connected with a pin column (221), the pin column (221) penetrates through the sliding hole (18) formed in the side wall of the pressing plate (11), one end of the pin column (221) close to the first base (41) is fixedly connected with a locking head (222), the two hook rods (16) arranged in an upper and lower manner clasp the locking head (222) passing through the sliding hole (18), the pressing plate (11) slides to the side close to the first base (41), two locking heads (222) and pin columns (221) are driven to slide by the two pairs of hook rods (16), so that the two ball placeholder cores (22) slide to the first base (41), and the shaped plastic part is pulled out from the inside of the cavity shell (6).
4. The compression molded model of a plastic part of a linear guide rail pair according to claim 3, characterized in that: The driving rod (12) is fixedly connected to one side of the pressing plate (11) close to the first base (41), a gas cylinder (3) is fixedly installed above the first base (41), the piston rod of the gas cylinder (3) is connected with the driving rod (12), a connecting plate (13) is fixedly installed above the driving rod (12), the connecting plate (13) is provided with a notch downward, two first connecting rods (14) are fixedly connected to the lower end of the connecting plate (13), a second connecting rod (15) is fixedly connected to the end of the first connecting rod (14) away from the first base (41), the middle sections of each hook rod (16) in each pair of hook rods (16) are respectively hingedly connected to the upper end and the lower end of the second connecting rod (15), a first spring (17) is installed between the two hook rods (16), the first spring (17) keeps the two hook rods (16) horizontal, when the locking head (222) passes between the two hook rods (16), the two hook rods (16) are driven to swing around the hinged points, the first spring (17) makes the two hook rods (16) return to the horizontal state.
5. The compression molded model of a plastic part of a linear guide rail pair according to claim 4, characterized in that: The end of the track occupying core (21) away from the first base (41) is fixedly connected with a blocking plate (23), two track occupying cores (21) are fixedly installed on the blocking plate (23), the blocking plate (23) blocks the end of the cavity shell (6) away from the pressing plate (11), the side of the blocking plate (23) away from the first base (41) is fixedly connected with a square rod (24), the middle section of the square rod (24) is fixedly connected with a reset sleeve (25), the second reset spring (26) is sleeved on the square rod (24) between the blocking plate (23) and the reset sleeve (25), after the hook rod (16) pulls the ball occupying core (22) to the direction of the first base (41), the second reset spring (26) pushes the reset sleeve (25) away from the first base (41), the track occupying core (21) and the ball occupying core (22) slide away from the first base (41) through the square rod (24) and the blocking plate (23), and return to the inside of the cavity shell (6).
6. The plastic part compression mold for a linear guide rail pair according to claim 5, wherein: The vertical rods (51) are fixedly installed on both sides of the gas cylinder (3), the upper ends of the vertical rods (51) are fixedly installed with two guide sliding plates (52) arranged in an up-down mode, the ends of the two guide sliding plates (52) close to the cavity shell (6) are provided in a horn shape expanding outward, when the two hook rods (16) slide between the two guide sliding plates (52), the two guide sliding plates (52) extrude the two hook rods (16) to the middle, extrude the first spring (17) and drive the ends of the two hook rods (16) away from the guide sliding plates (52) to move away from each other, under the pulling of the second reset spring (26), the locking head (222) is separated from the two hook rods (16), and the ball occupying core (22) and the track occupying core (21) slide to the inside of the cavity shell (6).