Three-face clamping mechanism of vacuum wax injection machine clamp

Abstract

The utility model relates to a three-side clamping mechanism of a vacuum wax injection machine clamp, which is characterized by comprising a rack, a bottom plate arranged on the rack and used for placing a vacuum wax injection mold, and a liftable pressing plate arranged on the rack, positioned above the bottom plate and used for pressing the vacuum wax injection mold downwards, a lifting supporting plate assembly capable of lifting by a plurality of gear heights is arranged below the bottom plate, the lifting supporting plate assembly is driven by a lifting driving mechanism to ascend and descend, and a plurality of side plates which move transversely and longitudinally and abut against the side face of the vacuum wax injection mold are arranged on the lifting supporting plate assembly. The bottom plate is provided with a through groove, and the side plate can penetrate out of the through groove from bottom to top and is used for avoiding transverse and longitudinal movement of the side plate. The device is convenient and fast to operate and use, the machine adjusting time is greatly shortened, and the quality and efficiency of produced finished products are improved.

Description

Technical Field:

[0002] The utility model relates to a three - side clamping mechanism of a fixture for a vacuum wax injection machine. Background Art:

[0004] A vacuum wax injection machine is an injection molding device for making wax molds. The fixture of the vacuum wax injection machine is used to fix the vacuum wax injection mold during wax injection. The vacuum wax injection mold is usually made of rubber material. When the vacuum wax injection mold enters the vacuum wax injection machine, it needs to be centered and clamped. However, the current fixtures of vacuum wax injection machines can only adapt to some models and thicknesses of vacuum wax injection molds. Therefore, when using other models and thicknesses of vacuum wax injection molds, the baffles (or side plates) need to be replaced, which requires a long debugging time and affects production efficiency.

[0005] For example, in the Chinese patent "Wax Injection Mold Fixture", publication number CN204470530U, it consists of a mold table, a downward pressing mechanism and a lifting mechanism. The base of the lifting mechanism is provided with a motor and a worm - gear reducer. The output shaft of the reducer controls the height of the lifting platform in the vertical direction. The base is fixed with symmetrically arranged linear bearings and guide shafts that cooperate with them. The mold table is provided with sliding platforms in two directions and an elastic swing - reset mechanism. The downward pressing mechanism is provided with a mechanism for horizontally adjusting the position of the cylinder and allowing the lower pressing plate to deflect. Although this patent provides a wax injection mold fixture that is convenient, stable, anti - jittery and has a reverse self - locking lifting function, and realizes the function of freely adjusting in the horizontal direction and deflecting the wax injection port of the mold in the vertical direction to achieve precise matching with the wax injection nozzle of the wax injection machine, it cannot be applied to various models and thicknesses of vacuum wax injection molds, thus affecting production efficiency. Summary of the Invention:

[0007] In view of the above - mentioned problems, the purpose of the present utility model is to provide a three - side clamping mechanism of a fixture for a vacuum wax injection machine. The three - side clamping mechanism of the fixture for the vacuum wax injection machine is reasonably designed, which is conducive to applying to various models and thicknesses of vacuum wax injection molds, shortening the machine - adjusting time, and improving production efficiency and product quality.

[0008] The three - side clamping mechanism of the fixture for the vacuum wax injection machine of the present utility model is characterized in that: it includes a frame, a bottom plate arranged on the frame for placing the vacuum wax injection mold, and a liftable pressing plate arranged on the frame above the bottom plate for pressing the vacuum wax injection mold downward. A liftable support plate assembly capable of lifting at several levels of height is arranged below the bottom plate. The liftable support plate assembly is driven by a lift driving mechanism to lift. A plurality of side plates that move horizontally and longitudinally and push against the side of the vacuum wax injection mold are arranged on the liftable support plate assembly to prevent the side of the vacuum wax injection mold from protruding due to the pressing of the liftable pressing plate and the bottom plate. A through - slot for the side plates to pass through from bottom to top and for avoiding the horizontal and longitudinal movement of the side plates is arranged on the bottom plate.

[0009] Preferably, the above-mentioned liftable support plate assembly is lifted by a lead screw nut mechanism driven by a motor or an electric push rod.

[0010] Preferably, the above-mentioned liftable support plate assembly is lifted by a cylinder or a hydraulic cylinder with multiple lifting heights at the output end.

[0011] Preferably, the above-mentioned liftable support plate assembly includes a first liftable plate and a second liftable plate which are fixedly connected in parallel at intervals. The lower part of the first liftable plate is connected to the output end of a lifting drive mechanism. The four corners of the second liftable plate are slidably connected to guide columns. The upper ends of the guide columns are fixedly connected to the bottom plate, and the lower ends of the guide columns are fixedly connected to the mounting plate. The lifting drive mechanism is mounted on the mounting plate.

[0012] Preferably, the above-mentioned side plates include two first side plates arranged in parallel and opposite to each other and a second side plate perpendicular to the first side plates. The two first side plates are used to squeeze the two opposite sides of the vacuum wax injection mold, and the second side plate cooperates with the rear side plate fixed on the bottom plate to squeeze the other two opposite sides of the vacuum wax injection mold.

[0013] Preferably, the two first side plates are driven to move relative to each other by a transverse drive mechanism, and the second side plate is driven to move relative to each other by a longitudinal drive mechanism.

[0014] Preferably, the above-mentioned transverse drive mechanism includes a first cylinder fixed on the second liftable plate and a first rack fixedly connected to the telescopic rod of the first cylinder. The first first side plate is also fixedly connected to the telescopic rod of the first cylinder. A first gear is rotatably hinged in the middle of the second liftable plate. The first rack is located on one side of the first gear and meshes with it. A second rack meshes with the other side of the first gear. The second first side plate is fixedly connected to the second rack. When the first cylinder works, it drives the telescopic rod of the first cylinder, the first first side plate and the first rack to perform linear telescopic motion, drives the first gear to rotate, and then drives the second rack and the second first side plate to perform linear motion, realizing the relative motion between the first first side plate and the second first side plate.

[0015] Preferably, the above-mentioned longitudinal drive mechanism includes a second cylinder fixed on the lower surface of the second liftable plate and a first sliding seat connected to the telescopic rod of the second cylinder. A second gear is rotatably hinged on the first sliding seat. A third rack meshing with the second gear and a second sliding seat are fixedly connected to the lower surface of the second liftable plate. A fourth rack meshing with the second gear and the second side plate are fixedly arranged on the second sliding seat. When the second cylinder works, it drives the telescopic rod of the second cylinder and the first sliding seat to perform linear motion, drives the second gear meshing with the third rack to rotate, and then drives the fourth rack, the second sliding seat and the second side plate to perform linear motion at a double speed.

[0016] Preferably, the above through slots include two symmetric first group through slots and a single second group through slot. The first group through slots include a longitudinal slot and two transverse slots connected to the longitudinal slot to form a "π" shape, and the second group through slot includes two vertically connected strip slots to form a "T" shape.

[0017] Preferably, both the above first side plate and the second side plate are rectangular plates. Two first vertical rods and a first connecting plate are sequentially connected below the first side plate, and the first connecting plates of the two first side plates are respectively fixedly connected to the first cylinder telescopic rod or the second rack. A second vertical rod and the second sliding seat are sequentially connected below the second side plate. The longitudinal slot is for the first side plate to pass through, the two transverse slots are for the two first vertical rods to pass through, and the two strip slots are respectively for the second side plate and the second vertical rod to pass through.

[0018] The working principle of the three-sided clamping mechanism of the vacuum wax injection machine fixture of the present utility model is as follows: according to vacuum wax injection molds of different models and thicknesses, the lifting drive mechanism is adjusted to drive the liftable support plate assembly to lift to different heights, meeting the height requirements of the side plates for resistance of vacuum wax injection molds of different models and thicknesses. The operation is convenient and fast, greatly shortening the machine adjustment time and improving the production efficiency. Description of the Drawings:

[0020] The present utility model will be further described below with reference to the drawings;

[0021] Figure 1 is a perspective view of the three-sided clamping mechanism of the vacuum wax injection machine fixture of the present utility model;

[0022] Figure 2 is Figure 1 a perspective view with the bottom plate and the rear side plate removed;

[0023] Figure 3 is a perspective view of the bottom plate and the rear side plate

[0024] Figure 4 is a partial view of the present invention;

[0025] Figure 5 is Figure 4 the rear view of;

[0026] Figure 6 is Figure 4 the exploded view of;

[0027] Figure 7 is Figure 1 a partial view of. Detailed Embodiments:

[0029] The present utility model will be further described below with reference to the drawings and detailed embodiments.

[0030] The three-sided clamping mechanism of the fixture of the vacuum wax injection machine of the utility model includes a frame 1, a bottom plate 2 arranged on the frame 1 for placing the vacuum wax injection mold (the bottom plate is relatively fixed to the frame), and a liftable pressing plate 3 arranged on the frame and above the bottom plate 2 for pressing down the vacuum wax injection mold. The liftable pressing plate 3 is driven to lift by a cylinder or an electric push rod fixed on the frame, etc.

[0031] Below the bottom plate, there is a liftable support plate assembly 4 that can be lifted by several levels. The liftable support plate assembly 4 can be driven to lift by a lift driving mechanism 6. Among them, the lift driving mechanism 6 can be a screw-nut mechanism or an electric push rod driven by a motor, or a cylinder or a hydraulic cylinder with multiple levels of lift height at the output end. In this application, a cylinder with three levels is preferably used.

[0032] On the liftable support plate assembly 4, there are several side plates 5 that move horizontally and vertically and push against the side of the vacuum wax injection mold to prevent the side of the square-shaped vacuum wax injection mold from protruding due to the pressing of the liftable pressing plate and the bottom plate (since the vacuum wax injection mold is made of materials such as rubber, it is easy to protrude on the side of the square-shaped vacuum wax injection mold under the up and down pressure of the liftable pressing plate and the bottom plate, affecting the molding of the wax injection part). On the bottom plate, there is a through groove 7 for the side plate 5 to pass through from bottom to top and for avoiding the horizontal and vertical movement of the side plate.

[0033] Specifically, the liftable support plate assembly 4 includes two first liftable plates 8 and second liftable plates 9 that are fixedly connected in parallel at intervals (they are fixedly connected by vertical connecting rods 31 at the four corners). The output end of the lift driving mechanism 6 is connected to the lower part of the first liftable plate 8. The four corners of the second liftable plate 9 are slidably connected to the guide posts 10 through linear bearings. The upper end of the guide post 10 is fixedly connected to the bottom plate 2, and the lower end of the guide post 10 is fixedly connected to the mounting plate 11. The lift driving mechanism 6 is installed on the mounting plate 11. In the embodiment of this application, that is, the cylinder block of the cylinder is fixedly installed on the mounting plate 11, and the telescopic rod of the cylinder passes through the mounting plate and is fixedly connected to the first liftable plate 8. Under the action of the lift driving mechanism 6, the first liftable plate 8, the vertical connecting rods 31, and the second liftable plate 9 are lifted and lowered synchronously.

[0034] The above-mentioned side plate 5 includes two first side plates 12 arranged parallel and opposite to each other and a second side plate 13 perpendicular to the first side plates (the first side plates 12 and the second side plate 13 do not interfere with each other's horizontal and vertical movements). The two first side plates are used to push against two opposite sides of the square-shaped vacuum wax injection mold, and the second side plate cooperates with the rear side plate 30 fixed on the bottom plate to push against the other two opposite sides of the vacuum wax injection mold.

[0035] To achieve the horizontal and vertical movement of the side plates, the above two first side plates 12 are driven to move relative to each other by a horizontal driving mechanism, and the second side plate 13 is driven to move relative to each other by a vertical driving mechanism. The horizontal driving mechanism and the vertical driving mechanism can be cylinders, hydraulic rods, electric push rods, etc. that respectively drive the first side plate 12 and the second side plate 13 to move horizontally and vertically.

[0036] Specifically, the above horizontal driving mechanism includes a first cylinder 14 fixed on the second liftable plate 9 and a first rack 15 fixedly connected to the telescopic rod of the first cylinder. The first first side plate is also fixedly connected to the telescopic rod of the first cylinder. A first gear 16 is rotatably hinged in the middle of the second liftable plate 9. The first rack 15 is located on one side of the first gear 16 and meshes with each other. A second rack 17 meshes with the other side of the first gear 16. The second first side plate is fixedly connected to the second rack 17. When the first cylinder works, it drives the telescopic rod of the first cylinder, the first first side plate and the first rack to perform linear telescopic motion, drives the first gear to rotate, and then drives the second rack and the second first side plate to perform linear motion, realizing the relative motion between the first first side plate and the second first side plate.

[0037] The above vertical driving mechanism includes a second cylinder 18 fixed on the lower surface of the second liftable plate 9 and a first sliding seat 19 connected to the telescopic rod of the second cylinder (the telescopic direction of the telescopic rod of the second cylinder is perpendicular to the telescopic direction of the telescopic rod of the first cylinder). A second gear 20 is rotatably hinged on the first sliding seat 19. A third rack 21 meshing with the second gear 20 is fixedly connected to the lower surface of the second liftable plate 9. And a second sliding seat 22 is slidably connected to the lower surface of the second liftable plate 9 (the first sliding seat and the second sliding seat slide on the lower surface of the second liftable plate 9 through a slide rail). A fourth rack 23 meshing with the second gear and the second side plate 13 (a second vertical rod 29, etc. is also connected between the second side plate 13 and the second sliding seat) are fixedly provided on the second sliding seat 22. When the second cylinder works, it drives the telescopic rod of the second cylinder and the first sliding seat to perform linear motion, drives the second gear meshing with the third rack to rotate, and then drives the fourth rack, the second sliding seat and the second side plate to perform linear motion at a multiple speed.

[0038] The through groove 7 includes two symmetric first group through grooves and a single second group through groove. The first group through grooves include a longitudinal strip groove 24 and two transverse strip grooves 25 connected to the longitudinal strip groove to form a "π" shape. The second group through groove includes two vertically connected strip grooves 26 to form a "T" shape.

[0039] Both the first side plate 12 and the second side plate 13 are rectangular plates. Below the first side plate 12, two first vertical rods 27 and a first connecting plate 28 are sequentially connected. The first connecting plates of the two first side plates are respectively fixedly connected to the first cylinder telescopic rod or the second rack (the first connecting plate 28 can be slidably connected to the upper surface of the second liftable plate 9 through the cooperation of a slider and a slide rail). Below the second side plate 13, a second vertical rod 29 and the second sliding seat 22 are sequentially connected. The longitudinal strip groove 24 is for the first side plate 12 to pass through (the longitudinal strip groove 24 is for avoiding the lifting of the first side plate 12). The two transverse strip grooves 25 are for the two first vertical rods 27 to pass through (the two transverse strip grooves 25 are for avoiding the lateral movement of the first vertical rods 27 and the first side plate 12). The two strip grooves 26 are respectively for the second side plate 13 and the second vertical rod 29 to pass through (specifically for avoiding the lifting of the second side plate 13 and the longitudinal movement of the second vertical rod 29 and the second side plate 13).

[0040] The working principle of the three-sided clamping mechanism of the fixture of the vacuum wax injection machine of the present invention is to adjust the lifting drive mechanism according to vacuum wax injection molds of different models and thicknesses, and drive the liftable support plate assembly to lift to different heights to meet the height requirements of the side plates for resistance of vacuum wax injection molds of different models and thicknesses. The operation is convenient and fast, greatly shortening the machine adjustment time and improving the production efficiency.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A three-sided clamping mechanism for a vacuum wax injection machine fixture, characterized in that: It includes a frame, a base plate arranged on the frame for placing the vacuum wax injection mold, and a liftable pressure plate arranged on the frame and located above the base plate for pressing the vacuum wax injection mold downward. A liftable support plate assembly that can be lifted or lowered to a certain height is arranged below the base plate. The liftable support plate assembly is driven to lift or lower by a lifting drive mechanism. The liftable support plate assembly is provided with a plurality of side plates that move horizontally and vertically and push against the side surfaces of the vacuum wax injection mold to avoid protrusion of the side surfaces of the vacuum wax injection mold caused by the pressing of the liftable pressure plate and the base plate. A through groove is arranged on the base plate for the side plates to pass through from bottom to top and for avoiding horizontal and vertical movement of the side plates.

2. The three-side clamping mechanism of the vacuum wax injection machine fixture according to claim 1 is characterized in that: The liftable support plate assembly is driven to rise and fall by a screw-nut mechanism or an electric push rod driven by a motor.

3. The three-side clamping mechanism of the vacuum wax injection machine fixture according to claim 1 is characterized in that: The liftable support plate assembly is driven to rise and fall by a cylinder with multiple lifting heights at the output end.

4. The three-side clamping mechanism of the vacuum wax injection machine fixture according to claim 1, 2 or 3, characterized in that: The liftable support plate assembly includes two parallel, spaced, and fixedly connected first and second liftable plates; the lower portion of the first liftable plate is connected to the output end of a lift drive mechanism; the four corners of the second liftable plate are slidably connected to guide columns; the upper end of the guide column is fixedly connected to the bottom plate; the lower end of the guide column is fixedly connected to the mounting plate; and the lift drive mechanism is mounted on the mounting plate.

5. The three-side clamping mechanism of the vacuum wax injection machine fixture according to claim 4 is characterized in that: The side panels include two first side panels arranged in parallel and opposite to each other and a second side panel perpendicular to the first side panels. The two first side panels are used to push two opposite side panels of the vacuum wax injection mold. The second side panels cooperate with the rear side panel fixed on the bottom panel to push the other two opposite side panels of the vacuum wax injection mold.

6. The three-side clamping mechanism of the vacuum wax injection machine fixture according to claim 5 is characterized in that: The two first side plates are driven to move relative to each other by a transverse driving mechanism, and the second side plates are driven to move relative to each other by a longitudinal driving mechanism.

7. The three-side clamping mechanism of the vacuum wax injection machine fixture according to claim 6 is characterized in that: The lateral driving mechanism includes a first cylinder fixed on the second liftable plate and a first rack fixedly connected to the telescopic rod of the first cylinder, a first first side plate is also fixedly connected to the telescopic rod of the first cylinder, a first gear is rotatably hinged on the middle part of the second liftable plate, the first rack is located on one side of the first gear and meshes with each other, a second rack is meshed on the other side of the first gear, and a second first side plate is fixedly connected to the second rack.

8. The three-side clamping mechanism of the vacuum wax injection machine fixture according to claim 6 or 7, characterized in that: The longitudinal driving mechanism includes a second cylinder fixed on the lower surface of the second liftable plate and a first slide seat connected to the telescopic rod of the second cylinder, a second gear is rotatably hinged on the first slide seat, a third rack meshing with the second gear is fixedly connected on the lower surface of the second liftable plate and a second slide seat is slidably connected, and a fourth rack meshing with the second gear and the second side plate are fixedly provided on the second slide seat.

9. The three-side clamping mechanism of the vacuum wax injection machine fixture according to claim 8, characterized in that: The through grooves include two symmetrical first groups of through grooves and a single second group of through grooves. The first group of through grooves includes a longitudinal groove and two transverse grooves connected to the longitudinal groove to form a "π" shape. The second group of through grooves includes two vertically connected strip grooves to form a "T" shape.

10. The three-side clamping mechanism of the vacuum wax injection machine fixture according to claim 9, characterized in that: The first side plate and the second side plate are both rectangular plates, and the two first vertical rods and the first connecting plate are connected in sequence below the first side plate, and the first connecting plates of the two first side plates are respectively fixedly connected to the first cylinder telescopic rod or the second rack, and the second vertical rod and the second slide seat are connected in sequence below the second side plate, the longitudinal groove is used for the first side plate to pass through, the two transverse grooves are used for the two first vertical rods to pass through, and the two strip grooves are used for the second side plate and the second vertical rod to pass through respectively.

Images