Injection molding machine movable and fixed mold plate pull rod and material falling protection device

Abstract

This utility model relates to the field of plastic processing machinery, specifically disclosing a moving mold, a fixed mold plate tie rod, and a material discharge protection device. It includes a moving mold plate, four tie rods, a fixed mold plate, a machine body, and a material discharge ramp. It also includes four tie rod protection fixing plates and four tie rod protection adjusting plates. The four tie rod protection fixing plates are symmetrically fixed and installed in pairs below the moving and fixed mold plates on opposite sides, with two of the two plates in each pair positioned above the two tie rods distributed front and rear below. The four tie rod protection adjusting plates are slidably connected to one of the tie rod protection fixing plates. This device effectively prevents oil stains from contaminating the ejected product, reduces manual cleaning costs, and improves production efficiency. The protection range is adaptable to molds of different thicknesses and various products. Installation and disassembly are convenient and do not affect mold assembly or disassembly. It also blocks dust and impurities to reduce tie rod wear.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing machinery, and specifically discloses an injection molding machine, a fixed template tie rod, and a material drop protection device. Background Technology

[0002] An injection molding machine is a general-purpose device that injects plastic particles into a mold cavity after plasticizing and melting them, and then molds them by holding pressure and cooling to obtain plastic products. The mold closing mechanism is the core component of the injection molding machine, which consists of a moving platen, a fixed platen, and four tie rods connecting the two. The moving platen moves back and forth along the tie rods under the drive of the hydraulic cylinder to realize the opening and closing of the mold.

[0003] To ensure the smooth movement of the moving template and reduce wear, lubricating oil needs to be added to its guide hole regularly. However, in actual production, due to the continuous reciprocating movement of the moving template, the lubricating oil in the guide hole will inevitably be scraped and stuck to the surface of the tie rod. Over a long period of time, a large amount of oil and dust will accumulate on the tie rod and the machine platform below it.

[0004] Currently, after the molding cycle is complete, the ejector device ejects the product from the mold. When a large number of products are ejected at once or the ejection action is fast, some products are prone to falling and remaining on the oil-stained pull rods or machine platform. This leads to surface contamination of the products, affecting their cleanliness and quality. Even more inconvenient is that operators must stop production to manually pick up and clean products that have fallen onto the machine platform or even bounced to the ground. This process not only increases the labor intensity and time consumption of workers but also severely reduces the equipment's production efficiency and automation level.

[0005] In the existing technology, there is a lack of a dedicated device that can effectively address this problem. Although there are general protective covers or collection tanks, they are often complex in structure, occupy a lot of space, and cannot adapt to the spatial changes caused by different mold thicknesses. They also need to be completely removed when installing and disassembling the mold, making them extremely inconvenient to use and poorly adaptable.

[0006] Therefore, how to provide a protective device that is simple in structure, easy to adjust, does not affect normal mold changing, and can effectively prevent product contamination and guide the material falling has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] This utility model proposes a motorized injection molding machine, a fixed template tie rod, and a material dropping protection device. Through an adjustable protective structure, this utility model achieves multiple beneficial effects, including product contamination prevention, automatic material dropping, improved efficiency, labor saving, and compatibility with different molds.

[0008] This utility model is implemented as follows: a moving mold, a fixed mold plate tie rod and a material drop protection device for injection molding, including a moving mold plate, four tie rods, a fixed mold plate, a machine body and a material drop inclined plate, and also including four tie rod protection fixing plates and four tie rod protection adjusting plates; The four tie rod protection fixing plates are symmetrically fixed and installed in pairs below the moving template and the fixed template on opposite sides, and the two tie rod protection fixing plates in each group are respectively located above the two tie rods distributed in front and behind below; The four tie rod protection adjustment plates are slidably connected to one of the tie rod protection fixing plates, and are located on the side of the tie rod protection fixing plate away from the fixed template or the moving template; The pull rod protection adjustment plate has an elongated slot, and the pull rod protection adjustment plate is connected to the pull rod protection fixing plate through the elongated slot to form an adjustable protection width.

[0009] As a preferred embodiment of the injection molding machine, fixed template tie rod and material drop protection device of this utility model, the tie rod protection fixing plate includes a mounting base plate and a bending plate, and the bending plate is provided with a rivet nut for fixing to the tie rod protection adjustment plate.

[0010] As a preferred embodiment of the injection molding machine, fixed template tie rod and material drop protection device of this utility model, the bending plate is provided with a baffle on the side, a guide plate on the bottom, and the upper plane is a slope structure with an angle θ.

[0011] As a preferred embodiment of the injection molding machine, fixed template tie rod and material drop protection device of this utility model, the two elongated slots on the tie rod protection adjustment plate are connected to the tie rod protection fixing plate by a flat washer, a spring washer and a ball head hex screw.

[0012] As a preferred embodiment of the injection molding machine, fixed template tie rod and material drop protection device of this utility model, the tie rod protection fixing plate and the tie rod protection adjusting plate are made of metal sheet with rust prevention treatment on the surface.

[0013] The beneficial effects of this utility model are: 1. The device is designed to fit snugly against the pull rod, without affecting the installation and disassembly of the mold. The pull rod protection adjustment plate can be fully retracted for easy mold replacement, fundamentally solving the problem of product contamination caused by oil stains on the pull rod and machine body, ensuring product cleanliness and reducing the defect rate. It also enables automatic guidance and collection of products, avoiding production interruptions and manual picking and wiping, saving labor costs, and improving equipment utilization and production efficiency.

[0014] 2. Its unique adjustable design allows it to quickly adapt to the production needs of molds of different thicknesses. One device can cover multiple products, making it highly versatile and reducing the investment in special tooling.

[0015] 3. The device has a compact and small structure, fits closely to the equipment layout, does not occupy extra space, and can be used for mold changing without disassembly, which greatly facilitates equipment maintenance and production operations. It also shields the dust and impurities falling from above to a certain extent, reducing the risk of impurities entering the tie rod hole and causing wear, and provides additional protection for the core components tie rod and guide hole. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of this utility model.

[0019] Figure 3 This is a cross-sectional view of the structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the installation of this utility model.

[0021] Figure 5 This is a three-dimensional schematic diagram of the tie rod protection fixing plate of this utility model.

[0022] Figure 6 This is a side view of the tie rod protection fixing plate of this utility model.

[0023] Figure 7 This is a three-dimensional schematic diagram of the pull rod protection adjustment plate of this utility model.

[0024] Figure 8 This is a schematic diagram of the structure of this utility model.

[0025] The markings in the diagram are: 1. Moving template; 2. Tie rod; 3. Fixed template; 4. Machine body; 5. Unloading ramp; 6. Tie rod protection fixing plate; 7. Tie rod protection adjusting plate; 8. Long slotted groove; 9. Mounting base plate; 10. Bending plate; 11. Rivet nut; 12. Baffle; 13. Guide plate; 14. Flat washer; 15. Spring washer; 16. Ball head socket head cap screw. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0027] Please see Figure 1-8 A moving mold plate, a fixed mold plate tie rod and a material drop protection device, comprising a moving mold plate 1, four tie rods 2, a fixed mold plate 3, a machine body 4 and a material drop inclined plate 5, and also including four tie rod protection fixing plates 6 and four tie rod protection adjusting plates 7; Four tie rod protection fixing plates 6 are installed in pairs, symmetrically fixed below the moving template 1 and the fixed template 3 on opposite sides, and the two tie rod protection fixing plates 6 in each pair are respectively located above the two tie rods 2 distributed in front and behind below; Four tie rod protection adjustment plates 7 are slidably connected to a tie rod protection fixing plate 6, and are located on the side of the tie rod protection fixing plate 6 away from the fixed template 3 or the moving template 1; The pull rod protection adjustment plate 7 has an elongated groove 8, which connects the pull rod protection fixing plate 6 to the pull rod protection fixing plate 6 to form an adjustable protection width.

[0028] In this embodiment: four tie rod protection fixing plates 6 are arranged in pairs and symmetrically fixed to the lower sides of the moving template 1 and the fixed template 3 on opposite sides by flat washers 14 and spring washers 15 and ball head hex screws 16, respectively. Each pair of tie rod protection fixing plates 6 is located above the two tie rods 2 below. This installation position can accurately cover the area above the tie rods 2 and the gap area between the machine body 4 and the template. The baffle 12 on the side of its bending plate 10 can directly block the products that are easy to fall after being ejected, preventing the products from contacting the oil stains on the surface of the tie rods 2 or the dirt on the platform of the machine body 4. At the same time, four tie rod protection adjusting plates 7 are connected to the tie rod protection fixing plates 6 by flat washers 14, spring washers 15 and ball head hex screws 16, respectively, by means of their own elongated grooves 8, and are located on the side of the tie rod protection fixing plates 6 away from the template. The baffle 1 on the tie rod protection adjusting plate 7 2 can further supplement the interception range to prevent the product from exceeding the protection area of ​​the pull rod protection fixing plate 6 due to the large force of the product ejection. The double baffle 12 structure cuts off the contact path between the product and the oil from the source. Secondly, the orderly dropping of the product is completed by the guide structure with the θ-angle slope. The bending plate 10 of the pull rod protection fixing plate 6 is designed with a slope with the θ angle, and a guide plate 13 is provided at the bottom. The upper surface of the pull rod protection adjustment plate 7 is also a slope with the θ angle. When the product is intercepted by the baffle 12, it will naturally fall on the slope surface. Under its own gravity, it will slide down the slope and be guided by the guide plate 13 of the pull rod protection fixing plate 6. Finally, it will fall accurately into the dropping slope 5 inside the machine body 4. The dropping slope 5 further uses the tilting structure to make the product slide to the designated collection area. No manual intervention is required throughout the process, realizing automatic and clean collection of products. Furthermore, the elongated slots 8 allow for adjustment to accommodate molds of different specifications; the two elongated slots 8 on the tie rod protection adjustment plate 7 allow the tie rod protection adjustment plate 7 to slide laterally along the tie rod protection fixing plate 6, changing the protection width on one side (adjustment range is ΔS): when using a maximum thickness of Hmax When using a mold with a minimum thickness of Hmin, the sliding tie rod protection adjustment plate 7 is extended to its maximum position, so that the double-sided protection width reaches 2Smax, ensuring that the protection range covers the areas on both sides of the mold that are prone to falling. When using a mold with a minimum thickness of Hmin, the tie rod protection adjustment plate 7 is retracted towards the template, so that the double-sided protection width is reduced to 2Smin, avoiding the protective device occupying the mold installation space. At the same time, the mounting base plate 9 of the tie rod protection fixing plate 6 ensures a stable connection between the tie rod protection fixing plate 6 and the moving template 1 and the fixed template 3. The rivet nut 11 of the bending plate 10 simplifies the disassembly and assembly of the tie rod protection adjustment plate 7 and the tie rod protection fixing plate 6. With the anti-loosening and anti-deformation functions of the flat washer 14 and the spring washer 15, the device can still maintain stable protection performance in the vibration environment of the moving template 1 reciprocating along the tie rod 2. Moreover, the mold can be replaced without disassembling the entire device, taking into account both adaptability and practicality. like Figure 8 As shown, the adjustable range of the protective width of the protective device is ΔS. The maximum protective width 2Smax is suitable for the maximum mold thickness Hmax, and the minimum protective width 2Smin is suitable for the minimum mold thickness Hmin.

[0029] As a technical optimization of this utility model, the tie rod protection fixing plate 6 includes a mounting base plate 9 and a bending plate 10. The bending plate 10 is provided with a rivet nut 11 for fixing to the tie rod protection adjusting plate 7.

[0030] In this embodiment: the mounting base plate 9 ensures a stable connection between the tie rod protection fixing plate 6 and the template; the bending plate 10 provides a foundation for the interception and guiding structure; the rivet nut 11 simplifies the disassembly and assembly of the tie rod protection adjusting plate 7 and improves the ease of use of the device.

[0031] As a technical optimization of this utility model, the bending plate 10 is provided with a baffle 12 on one side, a guide plate 13 on the lower side, and the upper plane is a slope structure with an angle θ.

[0032] In this embodiment: the baffle 12 directly prevents the product from falling into the gap between the machine body 4 or the protective door, thus avoiding pollution at the source; the ramp and guide plate 13 use gravity to guide the product to slide towards the discharge ramp 5 without manual intervention.

[0033] As a technical optimization of this utility model, the two elongated slots 8 on the pull rod protection adjustment plate 7 are connected to the pull rod protection fixing plate 6 through a flat washer 14, a spring washer 15 and a ball head hex screw 16.

[0034] In this embodiment: two long waist-shaped grooves 8 ensure that the force is balanced when the pull rod protects the adjustment plate 7 slides, avoiding displacement; the matching fastener combination improves the connection stability and prevents loosening caused by long-term vibration.

[0035] As a technical optimization of this utility model, the materials of the tie rod protection fixing plate 6 and the tie rod protection adjusting plate 7 are metal plates with rust-proof treatment on the surface.

[0036] In this embodiment: the metal sheet ensures structural strength and withstands the mechanical impact of the injection molding machine's working environment; the rust prevention treatment extends the service life of the device and avoids rust contamination of the products or affecting the movement of the moving template 1 along the tie rod 2.

[0037] Working principle and usage process of this utility model: During the installation phase, the four tie rod protection fixing plates 6 are fixed in pairs, using flat washers 14, spring washers 15, and ball-head hexagonal screws 16. These plates are symmetrically fixed to the lower sides of the moving template 1 (two plates per pair, located above the front and rear tie rods 2) and the lower sides of the fixed template 3 (same installation position as the moving template 1). Four tie rod protection adjusting plates 7 are then connected to one tie rod protection fixing plate 6, using flat washers 14, spring washers 15, and ball-head hexagonal screws 16, passing through the elongated slots 8 of the adjusting plate 7 and connecting to the rivet nuts 11 of the fixing plate 6 for initial fixing (not yet tightened). Depending on the thickness of the mold being used (e.g., Hmax or Hmin), the adjusting plates 7 are slid to the corresponding protection width (2Smax or 2Smin). After confirming that the protection range covers the gap between the tie rod 2 and the machine body 4, the connecting screws are tightened to complete the installation.

[0038] During normal production, the injection molding machine operates as follows: the mold closing mechanism moves the moving platen 1 along the tie rod 2 towards the fixed platen 3, completing the mold closing; after plasticizing and melting, the plastic particles are injected into the mold cavity, held under pressure and cooled to form the product; after forming, the moving platen 1 retracts along the tie rod 2 to open the mold, and the ejector device ejects the product from the mold; some easily falling products are intercepted by the baffle 12 of the tie rod protection fixing plate 6 and the tie rod protection adjusting plate 7, falling onto the ramp with an angle θ, and automatically sliding along the ramp and guide plate 13 into the discharge ramp 5, finally entering the collection area; during production, the device is close to the tie rod 2, blocking dust and impurities above the tie rod 2, preventing impurities from entering the hole of the tie rod 2 and causing wear; at the same time, when lubricating oil adheres to the surface of the tie rod 2, the product will not come into contact with the oil stains on the tie rod 2 due to the interception of the device.

[0039] During mold replacement, the tie rod protection adjustment plate 7 is retracted: Loosen the connecting screws between the tie rod protection adjustment plate 7 and the tie rod protection fixing plate 6, and fully retract the tie rod protection adjustment plate 7 towards the mold template to reduce the protection width to a range that does not affect mold assembly and disassembly; After removing the old mold and installing the new mold, slide the tie rod protection adjustment plate 7 to the corresponding protection width (2Smin) according to the thickness of the new mold (e.g., changing from Hmax to Hmin), tighten the screws, and production can be resumed without removing the entire protective device.

[0040] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] However, the above are merely specific embodiments of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A moving mold plate, fixed mold plate tie rods and a material drop protection device for injection molding, comprising a moving mold plate (1), four tie rods (2), a fixed mold plate (3), a machine body (4) and a material drop ramp (5), characterized in that: It also includes four tie rod protection fixing plates (6) and four tie rod protection adjusting plates (7); The four tie rod protection fixing plates (6) are symmetrically fixed and installed in pairs below the moving template (1) and the fixed template (3) on opposite sides, and the two tie rod protection fixing plates (6) in each group are respectively located above the two tie rods (2) distributed in front and behind below; The four tie rod protection adjustment plates (7) are slidably connected to one of the tie rod protection fixing plates (6) and are located on the side of the tie rod protection fixing plate (6) away from the fixed template (3) or the moving template (1); The pull rod protection adjustment plate (7) has an elongated groove (8) and the pull rod protection fixing plate (6) is connected through the elongated groove (8) to form an adjustable protection width.

2. The injection molding machine, fixed template tie rod, and material drop protection device according to claim 1, characterized in that: The tie rod protection fixing plate (6) includes a mounting base plate (9) and a bending plate (10). The bending plate (10) is provided with a rivet nut (11) for fixing to the tie rod protection adjusting plate (7).

3. The injection molding machine, fixed template tie rod, and material drop protection device according to claim 2, characterized in that: The bending plate (10) has a baffle (12) on one side, a guide plate (13) on the lower side, and a slope structure with an angle θ on the upper plane.

4. The injection molding machine, fixed template tie rod, and material drop protection device according to claim 1, characterized in that: The two elongated slots (8) on the pull rod protection adjustment plate (7) are connected to the pull rod protection fixing plate (6) through a flat washer (14), a spring washer (15) and a ball head hex screw (16).

5. The injection molding machine, fixed template tie rod, and material drop protection device according to claim 1, characterized in that: The tie rod protection fixing plate (6) and tie rod protection adjusting plate (7) are made of metal plates with rust prevention treatment on the surface.

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