Sliding block anti-retreating structure of injection mold

Abstract

The utility model provides an injection mold slide block anti-retreat structure, an injection mold comprises a mold plate, a mold core and an insert, the mold core and the insert are used for forming, the insert is fixed at one end of a slide block, the other end of the slide block is connected with a telescopic end of an oil cylinder, and an anti-retreat mechanism is correspondingly arranged between the slide block and the mold plate. The anti-retreating mechanism comprises a first locking block arranged on the sliding block and a self-locking seat fixedly connected with the template, the self-locking seat comprises a locking block fixing seat and a second locking block matched with the first locking block, and the second locking block is connected with the locking block fixing seat through an elastic assembly; a locking groove is formed in the second locking block, and in the mold closing state, the first locking block is clamped into the locking groove to prevent the sliding block from retreating.

Description

Technical Field

[0001] The utility model relates to an injection mold accessory, in particular to an injection mold slider anti-retraction structure. Background Art

[0002] Injection molds are commonly used in the industrial mass production of parts. The process involves injecting molten material into the mold cavity under high pressure. After cooling and solidification, the resulting molded product is formed. The mold structure primarily consists of a mold plate, a core, and an ejector mechanism. The mold plate forms the main body of the mold, the core forms the product, and the ejector mechanism ejects the molded part. To facilitate demolding, a portion of the mold cavity's inner wall is formed by a slider insert, which is driven by a hydraulic cylinder.

[0003] During the injection molding process, the slider insert will push the slider and cylinder backward due to the high injection pressure of the plastic (that is, when the injection pressure is greater than the pressure of the cylinder), resulting in the slider insert being unable to seal the glue position and causing glue leakage or burrs. In addition, since the cylinder relies on an external hydraulic press to increase the oil pressure, it needs to continuously apply pressure during the mold injection process to ensure that the injection pressure is always less than the thrust of the cylinder. However, this requirement will cause the cylinder to work at high load for a long time, and the oil seal inside the cylinder is easily damaged, and even oil leakage may occur.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-retraction structure for a slider of an injection mold in view of the deficiencies in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An injection mold slider anti-retreat structure, the injection mold includes a template and a mold core and insert for forming, the insert is fixed to one end of the slider, and the other end of the slider is connected to the telescopic end of the oil cylinder. An anti-retreat mechanism is correspondingly arranged between the slider and the template, and the anti-retreat mechanism includes a first locking block arranged on the slider and a self-locking seat fixedly connected to the template, the self-locking seat includes a locking block fixing seat and a second locking block matching the first locking block, the second locking block and the locking block fixing seat are connected by an elastic component, and the spring-up direction of the elastic component is perpendicular to the sliding direction of the slider; a locking groove is provided on the second locking block, and in the mold closing state, the first locking block is stuck in the locking groove.

[0008] The oil cylinder is fixed on the oil cylinder fixing seat. The top surface of the oil cylinder fixing seat is provided with a mounting groove. The side of the mounting groove close to the oil cylinder is provided with a U-shaped notch. The telescopic end of the oil cylinder passes through the U-shaped notch to connect the slider; the side of the mounting groove away from the oil cylinder is open to form a channel for accommodating the passage of the slider.

[0009] The ground of the mounting groove is connected to a wear-resistant plate, the slider is located on the upper side of the wear-resistant plate, and a through hole is provided on the wear-resistant plate to accommodate the passage of the second locking block. Pressure plates are set on both sides of the mounting groove corresponding to the slider, and the pressure plates are parallel to the sliding direction of the slider; steps extend from the bottom of both sides of the slider, and the pressure plates are pressed on the upper side of the steps.

[0010] A rectangular hole is provided on the slider, which passes through the upper and lower parts. An opening is provided on one side of the rectangular hole to communicate with the mounting groove. An inner pulling core is provided in the rectangular hole. The outer contour of the inner pulling core is smaller than the inner contour of the rectangular hole. A connecting block is provided on the side of the inner pulling core close to the opening of the rectangular hole. The connecting block passes through the opening of the rectangular hole and is connected to the telescopic end of the oil cylinder. A first locking block is provided on the lower side of the inner pulling core.

[0011] The side surfaces of the first locking block and the locking groove close to the oil cylinder are both inclined surfaces.

[0012] Compared with the existing technology, the present invention has the following advantages: it provides an anti-retraction structure for the slider of an injection mold. When the oil cylinder pushes the slider to close the mold, the second locking block is pushed out by the elastic component, and the first locking block on the slider enters the locking groove of the second locking block, preventing the slider from retreating. Preferably, an inner pull core is installed in the slider. When the oil cylinder is pulled outward, it first drives the inner pull core outward. The inclined surface at the bottom of the inner pull core presses the second locking block downward, allowing the oil cylinder to be pulled out smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model (1).

[0014] Figure 2 It is a structural diagram (2) of the present utility model.

[0015] Figure 3 It is a structural schematic diagram of the utility model without the self-locking seat.

[0016] Figure 4 It is a structural schematic diagram of the inner core pulling in the utility model.

[0017] Figure 5 It is a structural diagram of the second locking block in the utility model.

[0018] In the figure: 1. Cylinder; 2. Slider; 3. Lock block holder; 4. Insert; 5. Cylinder holder; 6. U-shaped notch; 7. Wear plate; 8. Second locking block; 9. Elastic component; 10. Rectangular hole; 11. Inner core; 12. Pressure plate; 13. Step; 14. Through hole; 15. First locking block; 16. Connecting block; 17. Locking groove. DETAILED DESCRIPTION

[0019] The technical solution of the present utility model is further described in detail below through specific implementation methods.

[0020] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. "Installed", "provided with", "connected", etc. can adopt conventional means in the prior art, such as: integral setting, snap-on installation, welding connection, adhesive connection, bolt connection, etc. For ordinary technicians in this field, they can understand the specific meanings of the above terms in this utility model according to specific circumstances and select appropriate connection, setting or installation methods in the prior art.

[0021] like Figure 1-5 As shown, an injection mold slider anti-retraction structure, the injection mold includes a template and a mold core and insert 4 for forming. The insert 4 is fixed to one end of the slider 2, and the other end of the slider 2 is connected to the telescopic end of the oil cylinder 1. An anti-retraction mechanism is correspondingly provided between the slider 2 and the template. The anti-retraction mechanism includes a first locking block 15 provided on the slider 2 and a self-locking seat fixedly connected to the template. The self-locking seat includes a locking block fixing seat 3 and a second locking block 8 that cooperates with the first locking block 15. The second locking block 8 is connected to the locking block fixing seat 3 through an elastic component 9, and the elastic component's springing direction is perpendicular to the sliding direction of the slider; the second locking block 8 is provided with a locking groove 17. In the mold closing state, the first locking block 15 is snapped into the locking groove 17. Specifically, the elastic component can be a spring, and a circular mounting groove can be provided at the bottom of the second locking block to connect with the spring.

[0022] During use, when the oil cylinder pushes the slider to close the mold, the second locking block will be pushed out by the elastic component, and the first locking block on the slider enters the locking groove of the second locking block to prevent the slider from retreating.

[0023] In one embodiment, the oil cylinder 1 is fixed on the oil cylinder fixing base 5, and a mounting groove is provided on the top surface of the oil cylinder fixing base 5. A U-shaped notch 6 is provided on the side of the mounting groove close to the oil cylinder 1. The telescopic end of the oil cylinder 1 passes through the U-shaped notch 6 to connect the slider 2; the side of the mounting groove away from the oil cylinder 1 is open to form a channel for accommodating the passage of the slider 2, so that the oil cylinder drives the slider to move conveniently.

[0024] In one embodiment, a wear plate 7 is connected to the ground of the mounting slot, and a slider 2 is positioned above the wear plate 7. A through hole 14 is provided on the wear plate 7 to accommodate a second locking block 8. Pressure plates 12 are provided on either side of the mounting slot corresponding to the slider 2, parallel to the sliding direction of the slider 2. Steps 13 extend from the bottom of each side of the slider 2, with the pressure plates 12 pressing on the upper side of the steps 13. The pressure plate and step design improves the sliding stability of the slider. Furthermore, it should be noted that the wear plates are made of a common wear-resistant material in the prior art.

[0025] In one embodiment, a rectangular hole 10 is provided on the slider 2, which passes through the slider 2 from top to bottom. An opening is provided on one side of the rectangular hole 10 to communicate with the mounting groove. An inner core pull 11 is provided in the rectangular hole 10. The outer contour of the inner core pull 11 is smaller than the inner contour of the rectangular hole 10. A connecting block 16 is provided on the side of the inner core pull 11 close to the opening of the rectangular hole 10. The connecting block 16 passes through the opening of the rectangular hole 10 and connects to the telescopic end of the oil cylinder 1. A first locking block 15 is provided on the lower side of the inner core pull 11. The sides of the first locking block 15 and the locking groove 17 close to the oil cylinder 1 are both inclined, and the side of the locking groove 17 opposite to the inclined surface is open. The inner core pull is installed in the slider. When the oil cylinder is pulled outward, the inner core pull is first driven outward. The inclined surface at the bottom of the inner core pull presses the second locking block downward, allowing the oil cylinder to be pulled out smoothly.

[0026] The above embodiments can be combined with each other.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for protection of the utility model.

Claims

1. An injection mold slider anti-retraction structure, the injection mold includes a template and a mold core and an insert for forming. The insert is fixed to one end of the slider, and the other end of the slider is connected to the telescopic end of the cylinder. It is characterized by: An anti-retreat mechanism is correspondingly arranged between the slider and the template. The anti-retreat mechanism includes a first locking block arranged on the slider and a self-locking seat fixedly connected to the template. The self-locking seat includes a locking block fixing seat and a second locking block matching the first locking block. The second locking block and the locking block fixing seat are connected by an elastic component, and the springing direction of the elastic component is perpendicular to the sliding direction of the slider; a locking groove is provided on the second locking block, and in the mold closing state, the first locking block is stuck in the locking groove.

2. The anti-retraction structure of the injection mold slider according to claim 1, characterized in that: The oil cylinder is fixed on the oil cylinder fixing seat. The top surface of the oil cylinder fixing seat is provided with a mounting groove. The side of the mounting groove close to the oil cylinder is provided with a U-shaped notch. The telescopic end of the oil cylinder passes through the U-shaped notch to connect the slider; the side of the mounting groove away from the oil cylinder is open to form a channel for accommodating the passage of the slider.

3. The anti-retraction structure of the injection mold slider according to claim 2, characterized in that: The ground of the mounting groove is connected to a wear-resistant plate, the slider is located on the upper side of the wear-resistant plate, and a through hole is provided on the wear-resistant plate to accommodate the passage of the second locking block. Pressure plates are set on both sides of the mounting groove corresponding to the slider, and the pressure plates are parallel to the sliding direction of the slider; steps extend from the bottom of both sides of the slider, and the pressure plates are pressed on the upper side of the steps.

4. The anti-retraction structure of the injection mold slider according to claim 3, characterized in that: A rectangular hole is provided on the slider, which passes through the upper and lower parts. An opening is provided on one side of the rectangular hole to communicate with the mounting groove. An inner pulling core is provided in the rectangular hole. The outer contour of the inner pulling core is smaller than the inner contour of the rectangular hole. A connecting block is provided on the side of the inner pulling core close to the opening of the rectangular hole. The connecting block passes through the opening of the rectangular hole and is connected to the telescopic end of the oil cylinder. A first locking block is provided on the lower side of the inner pulling core.

5. The anti-retraction structure of the injection mold slider according to claim 4, characterized in that: The side surfaces of the first locking block and the locking groove close to the oil cylinder are both inclined surfaces.

Images