A plastic mold guiding mechanism

Abstract

The present application discloses a plastic mold guide mechanism, including an upper mold and a lower mold, wherein the upper mold and the lower mold form a mold cavity in the middle when the mold is closed; guide posts are provided at the four end corners of the upper mold, and guide groove structures are provided at the four end corners of the lower mold, wherein the guide groove structure is provided with a fixed portion on the side close to the mold cavity, and a sliding portion on the side away from the mold cavity, wherein the sliding portion includes a slide rail and a slider that can reciprocate in the slide rail, and the slider is connected to the rear end of the slide rail through a telescopic member; symmetrical semicircular grooves are provided on the opposite surfaces of the slider and the fixed portion, and the semicircular grooves of the slider and the semicircular grooves of the fixed portion relatively form circular guide grooves, and each guide groove corresponds to the position of each guide post. The utility model can reduce the difficulty of inserting the guide post and avoid damage to the guide post.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic molds, and more specifically to a plastic mold guiding mechanism. Background Art

[0002] The guide structure of the injection mold is mainly used to fix and position the mold so that it can maintain a stable state during the injection molding process. Common guide structures include guide posts, guide plates, etc. Among them, the guide post is the most common guide element, which is mainly used to position and fix the mold. In the existing mold guide structure, there is a large friction between the guide post and the guide groove when the mold is closed, which is not only difficult to install, but also very easy to cause damage and wear to the guide element, shortening the service life of the guide structure. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a plastic mold guiding mechanism, which can reduce the difficulty of inserting the guide pillar and avoid damage to the guide pillar, thereby extending the service life of the guiding mechanism.

[0004] The utility model solves the technical problem by adopting the following technical scheme: a plastic mold guiding mechanism, comprising an upper mold and a lower mold, wherein the upper mold and the lower mold form a mold cavity in the middle when the mold is closed; guide posts are arranged at the four end corners of the upper mold, and guide groove structures are arranged at the four end corners of the lower mold, wherein the guide groove structure is provided with a fixed part on a side close to the mold cavity, and a sliding part on a side away from the mold cavity, wherein the sliding part comprises a slide rail and a slider which can reciprocate in the slide rail, and the slider is connected to the rear end of the slide rail through a telescopic member; symmetrical semicircular grooves are arranged on the opposite surfaces of the slider and the fixed part, and the semicircular grooves of the slider and the semicircular grooves of the fixed part relatively form circular guide grooves, and the positions of the guide grooves correspond to the positions of the guide posts.

[0005] In a preferred technical solution, the guide groove structure also includes bolts; the bottom surface of the slider is provided with screw holes on both sides of the semicircular groove, and the bottom surface of the slide rail is provided with through holes corresponding to the positions of the screw holes when the mold is closed and passing through the slide rail from bottom to top; when the mold is closed, the bolts pass through the through holes from bottom to top and are inserted into the screw holes to fix the position of the slider.

[0006] In a preferred technical solution, the telescopic member is a spring, one end of the spring is connected to the rear end of the slider, and the other end of the spring is connected to the fixed plate at the rear end of the slide rail. This technology utilizes the automatic rebound performance of the spring to automatically push the slider back to the connection with the fixed part, which is convenient to use.

[0007] In a preferred technical solution, when the mold is closed, the distance from the rear end of the slider to the fixed plate is less than the length of the spring in the non-compressed state. The spring is in a compressed state, which helps to press the slider toward the fixed part, making the shape of the guide groove more stable.

[0008] In a preferred technical solution, the telescopic member is a telescopic rod, the front end of which is connected to the rear end of the slider, and the rear end of the telescopic rod passes through a fixed plate at the rear end of the slide rail and is connected to a pneumatic telescopic mechanism. This technology realizes automatic control of the movement of the slider through the telescopic rod of the pneumatic telescopic mechanism, and is easy to operate.

[0009] In a preferred technical solution, first protrusions are provided on both sides of the slider, and first grooves for the first protrusions to slide are provided on the inner walls on both sides of the slide rail, so that the slider is slidably connected to the slide rail more firmly, preventing the slider from shifting or shaking and maintaining its movement stability.

[0010] In a preferred technical solution, a second protrusion is provided at the bottom of the slider, and a second groove for sliding the second protrusion is provided in the middle of the bottom surface of the slide rail, so as to further stabilize the slider and improve the movement stability of the slider in the slide rail.

[0011] In a preferred technical solution, conical positioning bosses are provided at the four end corners of the upper mold, and positioning grooves cooperating with the conical positioning bosses are provided at the four end corners of the lower mold to achieve further positioning of the upper and lower molds.

[0012] In a preferred technical solution, the bottom end face of the guide post is an arc-shaped convex surface, and the bottom surface of the guide groove is an arc-shaped concave surface matching the arc-shaped convex surface, which can improve the fit between the guide post and the guide groove and improve the guiding effect.

[0013] In a preferred technical solution, a conical boss is provided on the bottom end face of the guide column, and an inverted conical groove matching the conical boss is provided on the bottom face of the guide groove, so that the positioning is more precise and the guiding effect is further improved.

[0014] It can be seen from the above technical solution that compared with the prior art, the beneficial effect of the utility model is: the above-mentioned plastic mold guiding mechanism can adopt a detachable fixed part and a slider to jointly form a guide groove, so that half of the guide groove is movable. When closing the mold, the slider is first pushed away from the fixed part, and the guide post is placed into the half of the guide groove on the fixed part, and then the slider is pushed to the guide post to form a complete guide groove. Since only half of the guide groove is in contact with the guide post when inserting, the contact area between the guide groove and the guide post is reduced, so that the friction between the two becomes smaller, which can reduce the difficulty of inserting the guide post and avoid damage to the guide post, thereby extending the service life of the guiding mechanism.

[0015] In addition, other advantages of the present invention will be given in the following description, and some will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a structural schematic diagram of the guide groove structure in the embodiment of the utility model;

[0018] Figure 3 It is a top view of the guide groove structure in the closed state in the embodiment of the utility model;

[0019] Figure 4 It is a top view of the guide groove structure in the separated state in the embodiment of the utility model;

[0020] Figure 5 It is a cross-sectional view of the closed state of the guide groove structure in the embodiment of the utility model;

[0021] Figure 6 It is a cross-sectional view of the guide groove structure in the separated state in the embodiment of the utility model;

[0022] 1. Upper mold; 10. Guide column; 2. Lower mold; 20. Guide groove; 21. Fixing part; 22. Slider; 221. First convex part; 222. Second convex part; 23. Slide rail; 231. First groove; 232. Second groove; 24. Telescopic part; 25. Through hole; 3. Mold cavity. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] In one embodiment, Figure 1-6 As shown, a plastic mold guiding mechanism comprises an upper mold 1 and a lower mold 2. The upper mold 1 and the lower mold 2 form a mold cavity 3 in the middle when the molds are closed.

[0026] Guide columns 10 are provided at the four end corners of the upper mold 1, and guide grooves 20 are provided at the four end corners of the lower mold 2. The guide groove 20 structure is provided with a fixing portion 21 on the side close to the mold cavity 3, and a sliding portion on the side away from the mold cavity 3. The sliding portion includes a slide rail 23 and a slider 22 that can reciprocate in the slide rail 23. The slider 22 is connected to the rear end of the slide rail 23 through a telescopic member 24.

[0027] Symmetrical semicircular grooves are formed on the opposite surfaces of the slider 22 and the fixing portion 21 . The semicircular grooves of the slider 22 and the fixing portion 21 form circular guide grooves 20 . The positions of the guide grooves 20 correspond to the positions of the guide posts 10 .

[0028] like Figure 3-6 As shown, the present embodiment adopts a separable fixed part 21 and a slider 22 to jointly form a guide groove 20, so that half of the guide groove 20 is movable. When the upper mold 1 and the lower mold 2 are molded together, the slider 22 is first pushed away from the fixed part 21 to make the guide groove structure in a separated state, and the guide post 10 is placed into the half of the guide groove 20 on the fixed part 21, and then the slider 22 is pushed to the other side of the guide post 10, that is, the guide groove structure is in a closed state, and the slider 22 and the semicircular groove on the fixed part 21 form a complete guide groove 20. In the above process, since only half of the guide groove 20 is in contact with the guide post 10 when the guide post 10 is initially placed, the contact area between the guide groove 20 and the guide post 10 is reduced, so that the friction between the two becomes smaller, which can reduce the difficulty of placing the guide post 10, and at the same time avoid damage to the guide post 10, and can extend the service life of the guide mechanism.

[0029] In this embodiment, the guide groove 20 structure also includes bolts; the bottom surface of the slider 22 is provided with screw holes on both sides of the semicircular groove, and the bottom surface of the slide rail 23 is provided with a through hole 25 corresponding to the position of the screw hole when the mold is closed and passing through the slide rail 23 from bottom to top. When the mold is closed, the bolt passes through the through hole 25 from bottom to top and is inserted into the screw hole to fix the position of the slider 22.

[0030] In the above embodiment, screw holes and through holes 25 are respectively provided on the slider 22 and the slide rail 23. When the mold is closed, the slider 22 can be more firmly fixed by installing bolts, thereby ensuring that the contact pressure between the guide column 10 and the guide groove 20 is large enough.

[0031] In one embodiment, the telescopic member 24 is a spring, one end of which is connected to the rear end of the slider 22, and the other end of which is connected to the fixed plate at the rear end of the slide rail 23. In this embodiment, the spring is used as the telescopic member 24, and the slider 22 can be automatically pushed back to the connection with the fixed portion 21 by utilizing the automatic rebound performance of the spring, which is convenient to use. In addition, the slider 22 is connected to the rear end of the slide rail 23 by the spring, which effectively prevents the slider 22 from being offset, thereby ensuring the stability of the movement of the slider 22.

[0032] Furthermore, when the upper mold 1 and the lower mold 2 are closed, the distance from the rear end of the slider 22 to the fixed plate is less than the length of the spring in the non-compressed state. The spring is in a compressed state, which helps to press the slider 22 toward the fixed part 21, making the shape of the guide groove 20 more stable.

[0033] In another embodiment, the telescopic member 24 is a telescopic rod, the front end of which is connected to the rear end of the slider 22, and the rear end of which passes through a fixed plate at the rear end of the slide rail 23 and is connected to a pneumatic telescopic mechanism. The above embodiment uses a telescopic rod of a pneumatic telescopic mechanism as the telescopic member 24, which can realize automatic control of the movement of the slider 22, and the operation is simple and convenient.

[0034] In the above embodiment, first protrusions 221 are provided on both sides of the slider 22, and first grooves 231 for the first protrusions 221 to slide are provided on the inner walls of both sides of the slide rail 23, so that the slider 22 is slidably connected to the slide rail 23 more firmly, preventing the slider 22 from shifting or shaking, and maintaining its movement stability.

[0035] Furthermore, a second protrusion 222 is provided at the bottom of the slider 22 , and a second groove 232 for the second protrusion 222 to slide is provided in the middle of the bottom surface of the slide rail 23 , so as to further stabilize the slider 22 and improve the movement stability of the slider 22 in the slide rail 23 .

[0036] In this embodiment, conical positioning bosses are further provided at the four end corners of the upper mold 1, and positioning grooves cooperating with the conical positioning bosses are provided at the four end corners of the lower mold 2. Through the cooperation of the conical positioning bosses and the positioning grooves, the upper and lower molds 2 can be further positioned to prevent displacement between the molds when the molds are closed, which affects the casting effect.

[0037] In this embodiment, the bottom end face of the guide column 10 is an arc-shaped convex surface, and the bottom surface of the guide groove 20 is an arc-shaped concave surface matching the arc-shaped convex surface, which can improve the fit between the guide column 10 and the guide groove 20, so that the guide column 10 can be pressed in the center of the guide groove 20 during work, thereby improving the guiding effect.

[0038] In this embodiment, a conical boss is provided on the bottom end surface of the guide post 10, and an inverted conical groove matching the conical boss is provided on the bottom surface of the guide groove 20. The conical boss has better positioning performance, can improve the fit between the guide post 10 and the guide groove 20, prevent the guide post 10 from deflecting, and improve the guiding effect.

[0039] Other structures and operations of the plastic mold guide mechanism according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the description of this specification, the reference terms "embodiment", "specific embodiment", "example" and the like mean that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention.

[0042] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined with each other in any one or more embodiments or examples in a suitable manner without interference or contradiction.

Claims

1. A plastic mold guiding mechanism, characterized in that: It comprises an upper mold and a lower mold, wherein the upper mold and the lower mold form a mold cavity in the middle when the mold is closed; Guide pillars are provided at the four end corners of the upper mold, and guide groove structures are provided at the four end corners of the lower mold. The guide groove structure is provided with a fixing portion on a side close to the mold cavity, and a sliding portion on a side away from the mold cavity. The sliding portion includes a slide rail and a slider that can reciprocate in the slide rail, and the slider is connected to the rear end of the slide rail through a telescopic member. Symmetrical semicircular grooves are provided on the opposite surfaces of the slider and the fixing part. The semicircular grooves of the slider and the semicircular grooves of the fixing part relatively form circular guide grooves, and the positions of the guide grooves correspond to the positions of the guide posts.

2. The plastic mold guiding mechanism according to claim 1, characterized in that: The guide groove structure also includes bolts; the bottom surface of the slider is provided with screw holes on both sides of the semicircular groove, and the bottom surface of the slide rail is provided with through holes corresponding to the positions of the screw holes when the mold is closed and passing through the slide rail from bottom to top; the bolts pass through the through holes from bottom to top when the mold is closed and are inserted into the screw holes.

3. The plastic mold guiding mechanism according to claim 1, characterized in that: The telescopic member is a spring, one end of which is connected to the rear end of the sliding block, and the other end of which is connected to a fixed plate at the rear end of the sliding rail.

4. The plastic mold guiding mechanism according to claim 3, characterized in that: When the mold is closed, the distance from the rear end of the slider to the fixed plate is less than the length of the spring in a non-compressed state.

5. The plastic mold guiding mechanism according to claim 1, characterized in that: The telescopic member is a telescopic rod, the front end of which is connected to the rear end of the sliding block, and the rear end of which passes through a fixing plate at the rear end of the slide rail and is connected to a pneumatic telescopic mechanism.

6. The plastic mold guiding mechanism according to any one of claims 1 to 5, characterized in that: First convex parts are arranged on both sides of the sliding block, and first grooves for the first convex parts to slide are arranged on the inner walls on both sides of the sliding rail.

7. The plastic mold guiding mechanism according to claim 6, characterized in that: A second convex portion is provided at the bottom of the sliding block, and a second groove for sliding of the second convex portion is provided in the middle of the bottom surface of the sliding rail.

8. The plastic mold guiding mechanism according to claim 1, characterized in that: Conical positioning bosses are also provided at the four end corners of the upper mold, and positioning grooves matching the conical positioning bosses are provided at the four end corners of the lower mold.

9. The plastic mold guiding mechanism according to claim 1, characterized in that: The bottom end surface of the guide column is an arc-shaped convex surface, and the bottom surface of the guide groove is an arc-shaped concave surface matching the arc-shaped convex surface.

10. The plastic mold guiding mechanism according to claim 1, characterized in that: The bottom end surface of the guide column is provided with a conical boss, and the bottom surface of the guide groove is provided with an inverted conical groove matching with the conical boss.

Images