Small-flow gas meter shell injection mold

Abstract

The utility model relates to the field of injection molds, and discloses a small-flow gas meter shell injection mold which comprises a lower mold plate, a stand column is fixedly connected to the top end of the lower mold plate, an upper mold plate is slidably connected to the outer wall of the stand column, a circular groove is formed in the inner wall of the upper mold plate, and an injection molding opening is formed in the top end of the upper mold plate. Mold cores are detachably connected to the inner walls of the upper mold plate and the lower mold plate, cylindrical blocks are fixedly connected to the inner walls of the upper mold plate and the lower mold plate, rotary knobs are rotatably connected to the inner walls of the cylindrical blocks, rectangular plates are fixedly connected to the inner sides of the rotary knobs, and extrusion blocks are elastically connected to the inner walls of the cylindrical blocks through reset springs a; a notch is formed in the tail end of the extrusion block, and a limiting assembly is fixedly connected to the outer wall of the extrusion block. According to the utility model, the mold core is convenient to replace, different shells can be processed without using customized injection molds, and only the mold core needs to be replaced, so that the cost is saved, and the replacement mode is simple and does not need auxiliary tools.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to an injection mold for a small-flow gas meter housing. Background Technique

[0002] Small-flow gas meters are mainly used to measure the consumption of small-flow gas, and are usually applied in residential, commercial and industrial fields. The housings of such gas meters are usually produced by injection molding process, and the injection mold plays a crucial role in this process. The following are some background information about the injection mold for the small-flow gas meter housing.

[0003] At present, the injection mold for the small-flow gas meter housing injects molten plastic into the cavity of the injection mold for the small-flow gas meter housing, and uses the upper and lower templates to press together to ensure that the plastic fully fills the cavity and obtains an ideal shape. Subsequently, the mold is cooled to quickly solidify and cure the plastic and then demold. However, in most equipment, the mold core is fixed on the template, and customized molds are required when making different outer casings, resulting in high costs. Even for some molds that can replace the mold core, additional auxiliary tools are needed, which is rather troublesome. Secondly, most equipment has automatic ejector pins to eject it during demolding. Such equipment has a high degree of automation and high costs, which is not conducive to popularization. Therefore, an injection mold for a small-flow gas meter housing is proposed to solve the above problems. Content of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides an injection mold for a small-flow gas meter housing, aiming to improve the problems in the prior art that it is not easy to replace the mold core and additional auxiliary tools are needed, and the cost of automatic demolding by ejector pins is high and it is not easy to popularize.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: an injection mold for a small-flow gas meter housing, including a lower template, a column is fixedly connected to the top end of the lower template, an upper template is slidably connected to the outer wall of the column, a circular groove is opened on the inner wall of the upper template, an injection port is opened at the top end of the upper template, the inner walls of the upper template and the lower template are both detachably connected with mold cores, columnar blocks are fixedly connected to the inner walls of the upper template and the lower template, a knob is rotatably connected to the inner wall of the columnar block, a rectangular plate is fixedly connected to the inner side of the knob, a pressing block is elastically connected to the inner wall of the columnar block through a return spring a, a notch is opened at the end of the pressing block, and a limiting component is fixedly connected to the outer wall of the pressing block.

[0006] As a further description of the above technical solution:

[0007] Four guide rods are fixedly connected to the inner wall of the lower template. A lifting plate is slidably connected to the outer wall of the guide rods. A thimble is fixedly connected to the top end of the lifting plate. A chute is formed in the side wall of the lifting plate. A central rod is slidably connected to the inner wall of the chute. Handles are fixedly connected to both ends of the central rod. A clamping block is elastically connected to the inner wall of the handle through a return spring b. A clamping groove is formed in the side wall of the lower template.

[0008] As a further description of the above technical solution:

[0009] The limiting component includes a limiting block. The back surface of the limiting block is fixedly connected to the outer wall of the extrusion block. The outer wall of the limiting block is slidably connected to the inner wall of the cylindrical block. A limiting groove is formed in the side wall of the die core. The outer wall of the limiting block is clamped with the inner wall of the limiting groove.

[0010] As a further description of the above technical solution:

[0011] The inner wall of the circular groove is slidably connected to the outer wall of the column.

[0012] As a further description of the above technical solution:

[0013] One end of the return spring a is fixedly connected to the outer wall of the extrusion block, and the other end of the return spring a is fixedly connected to the inner wall of the cylindrical block.

[0014] As a further description of the above technical solution:

[0015] The inclined surface of the extrusion block is slidably connected to the side wall of the rectangular plate, and the side wall of the rectangular plate is clamped with the inner wall of the notch.

[0016] As a further description of the above technical solution:

[0017] The outer wall of the thimble is slidably connected to the inner wall of the lower template, and the outer wall of the thimble is slidably connected to the inner wall of the die core.

[0018] As a further description of the above technical solution:

[0019] Both the handle and the outer wall of the central rod are slidably connected to the inner wall of the lower template.

[0020] As a further description of the above technical solution:

[0021] One end of the return spring b is fixedly connected to the inner wall of the handle, and the other end of the return spring b is fixedly connected to the bottom end of the clamping block.

[0022] As a further description of the above technical solution:

[0023] The outer wall of the clamping block is clamped with the inner wall of the clamping groove.

[0024] The utility model has the following beneficial effects:

[0025] 1. In the present utility model, by providing a knob, a limiting block, and a limiting groove, when the mold core needs to be replaced, the knob is rotated to make the rectangular plate slide out from the notch of the extrusion block. At this time, the return spring will push the extrusion block to move inward towards the inside of the cylindrical block, thereby driving the limiting block to be withdrawn from the limiting groove, so as to replace the mold core without the need to rely on additional auxiliary tools, which is relatively convenient.

[0026] 2. In the present utility model, by providing a handle and a clamping block, when demolding is required, the clamping block is pressed inward to release the clamping connection with the clamping groove, and then the handle is dragged to drive the central rod to slide along the inner wall of the lower template, thereby sliding through the sliding groove to drive the lifting table to drive the ejector pin to move upward to eject the housing for demolding. The cost is relatively low and it is easy to popularize. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an overall front view schematic diagram of an injection mold for a small-flow gas meter housing proposed by the present utility model;

[0028] Figure 2 is a cross-sectional view schematic diagram of the lower template of an injection mold for a small-flow gas meter housing proposed by the present utility model;

[0029] Figure 3 is a front view schematic diagram of the mold core of an injection mold for a small-flow gas meter housing proposed by the present utility model;

[0030] Figure 4 is a cross-sectional view schematic diagram of the cylindrical block of an injection mold for a small-flow gas meter housing proposed by the present utility model.

[0031] LEGEND DESCRIPTION:

[0032] 1. Lower template; 2. Column; 3. Circular groove; 4. Upper template; 5. Injection port; 6. Mold core; 7. Cylindrical block; 8. Knob; 9. Rectangular plate; 10. Extrusion block; 11. Notch; 12. Return spring a; 13. Limiting block; 14. Limiting groove; 15. Guide rod; 16. Lifting plate; 17. Ejector pin; 18. Central rod; 19. Sliding groove; 20. Handle; 21. Return spring b; 22. Clamping block; 23. Clamping groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0034] Refer to Figure 1 、 Figure 3 andFigure 4 , an embodiment provided by the utility model: a small-flow gas meter housing injection mold, which includes a lower template 1. A column 2 is fixedly connected to the top end of the lower template 1. The outer wall of the column 2 is slidably connected to an upper template 4. A circular groove 3 is opened on the inner wall of the upper template 4. The inner wall of the circular groove 3 is slidably connected to the outer wall of the column 2. The column 2 ensures that the upper and lower two sets of templates will not shift during pressing and are tightly pressed together. An injection port 5 is opened at the top end of the upper template 4. The inner walls of the upper template 4 and the lower template 1 are both detachably connected with a mold core 6. The dissolved plastic is injected into the cavity of the mold core 6 through the injection port 5. Columnar blocks 7 are fixedly connected to the inner walls of the upper template 4 and the lower template 1. A knob 8 is rotatably connected to the inner wall of the columnar block 7. A rectangular protrusion structure is arranged on the side wall of the knob 8 to prevent it from falling off by clamping the inner wall of the columnar block 7. A rectangular plate 9 is fixedly connected to the inner side of the knob 8. Rotating the knob 8 can drive the rectangular plate 9 to rotate. An extrusion block 10 is elastically connected to the inner wall of the columnar block 7 through a return spring a12. One end of the return spring a12 is fixedly connected to the outer wall of the extrusion block 10, and the other end of the return spring a12 is fixedly connected to the inner wall of the columnar block 7. The inclined surface of the extrusion block 10 is slidably connected to the side wall of the rectangular plate 9. The back surface of the extrusion block 10 is set as an inclined surface. The rotation of the rectangular plate 9 will squeeze the inclined surface of the extrusion block 10 to make it squeeze the return spring a12 and move outward. At the same time, the elastic force generated by the deformation of the return spring a12 gives the extrusion block 10 a reverse thrust to promote its reset. A notch 11 is opened at the end of the extrusion block 10. The side wall of the rectangular plate 9 is clamped with the inner wall of the notch 11. When the rectangular plate 9 slides into the notch 11, it will be clamped and will not slide easily. A limiting component is fixedly connected to the outer wall of the extrusion block 10. The limiting component includes a limiting block 13. The back surface of the limiting block 13 is fixedly connected to the outer wall of the extrusion block 10. The outer wall of the limiting block 13 is slidably connected to the inner wall of the columnar block 7. A limiting groove 14 is opened on the side wall of the mold core 6. The outer wall of the limiting block 13 is clamped with the inner wall of the limiting groove 14. When the rectangular plate 9 is clamped into the notch 11, the limiting block 13 completely extends out and is clamped into the limiting groove 14 to fix the mold core 6 on the template.

[0035] Refer to Figure 1 - Figure 2, four groups of guide rods 15 are fixedly connected to the inner wall of the lower template 1. The outer wall of the guide rod 15 is slidably connected to the lifting plate 16. The top of the lifting plate 16 is fixedly connected with a thimble 17. The outer wall of the thimble 17 is slidably connected to the inner wall of the lower template 1, and the outer wall of the thimble 17 is slidably connected to the inner wall of the mold core 6. The lifting plate 16 moves upward along the guide rod 15 to drive the thimble 17 to eject the plastic and quickly demold. A chute 19 is provided on the side wall of the lifting plate 16. The inner wall of the chute 19 is slidably connected with a central rod 18. The chute 19 is inclined. When the central rod 18 moves horizontally and slides along the chute 19, it will drive the lifting plate 16 to rise. Both ends of the central rod 18 are fixedly connected with handles 20. The handles 20 and the outer wall of the central rod 18 are both slidably connected to the inner wall of the lower template 1. Dragging the handle 20 can drive the central rod 18 to slide. The handle 20 is thicker than the central rod 18 and is stuck by the inner wall of the lower template 1 to prevent it from swaying left and right. The inner wall of the handle 20 is elastically connected with a latch 22 through a return spring b21. One end of the return spring b21 is fixedly connected to the inner wall of the handle 20, and the other end of the return spring b21 is fixedly connected to the bottom end of the latch 22. Pressing the latch 22 inward can cause it to compress the return spring b21 and retract. At the same time, the elastic force generated by the deformation of the return spring b21 gives the latch 22 an upward thrust to promote its reset. A card slot 23 is provided on the side wall of the lower template 1. The outer wall of the latch 22 is engaged with the inner wall of the card slot 23. The latch 22 is inserted into the card slot 23 to prevent the handle 20 from sliding randomly.

[0036] Working principle: The molten plastic is injected into the cavity of the mold core 6 through the injection port 5. The pressing of the upper and lower two groups of templates will make the plastic fully fill the mold cavity to form the desired shape. Subsequently, the mold is cooled to make the plastic quickly solidify and cure and then demold. When demolding the plastic, press the latch 22 inward to release its engagement with the card slot 23, then drag the handle 20 to drive the central rod 18 to slide along the inner wall of the lower template 1, and at the same time drive the lifting plate 16 to slide vertically along the guide rod 15, driving the thimble 17 to move upward to eject the plastic. After demolding, push the handle 20 back to its original position and release it. The return spring b21 will push the latch 22 back into the card slot 23 to fix it, and at the same time the thimble 17 will descend. When it is necessary to replace the mold core 6 to obtain different shells, rotate the knob 8 to make the rectangular plate 9 slide out of the notch 11. At this time, the return spring a12 will push the extrusion block 10 to retract, driving the limit block 13 to retract and be pulled out from the limit groove 14. At this time, the mold core 6 can be replaced. After replacement, rotate the knob 8 to make the rectangular plate 9 squeeze the inclined surface of the extrusion block 10 and slide into the notch 11, so that the extrusion block 10 squeezes the return spring a12 to drive the limit block 13 to re-engage in the limit groove 14 to fix the mold core 6 on the template. The replacement method is simple and does not require the aid of auxiliary tools.

[0037] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A low-flow gas meter housing injection mold, comprising a lower mold plate (1), characterized in that: The top of the lower template (1) is fixedly connected to a column (2), the outer wall of the column (2) is slidably connected to an upper template (4), the inner wall of the upper template (4) is provided with a circular groove (3), the top of the upper template (4) is provided with an injection port (5), the inner walls of the upper template (4) and the lower template (1) are both detachably connected to a mold core (6), the inner walls of the upper template (4) and the lower template (1) are both fixedly connected to a columnar block (7), the inner wall of the columnar block (7) is rotatably connected to a knob (8), the inner side of the knob (8) is fixedly connected to a rectangular plate (9), the inner wall of the columnar block (7) is elastically connected to an extrusion block (10) via a reset spring a (12), the end of the extrusion block (10) is provided with a notch (11), and the outer wall of the extrusion block (10) is fixedly connected to a limiting component.

2. The low-flow gas meter housing injection mold according to claim 1, characterized in that: The inner wall of the lower template (1) is fixedly connected with four groups of guide rods (15), the outer wall of the guide rods (15) is slidably connected with a lifting plate (16), the top of the lifting plate (16) is fixedly connected with a pin (17), the side wall of the lifting plate (16) is provided with a slide groove (19), the inner wall of the slide groove (19) is slidably connected with a center rod (18), both ends of the center rod (18) are fixedly connected with a handle (20), the inner wall of the handle (20) is elastically connected with a clamping block (22) via a reset spring b (21), and the side wall of the lower template (1) is provided with a clamping groove (23).

3. The low-flow gas meter housing injection mold according to claim 1, characterized in that: The limiting assembly comprises a limiting block (13), the back side of the limiting block (13) is fixedly connected to the outer wall of the extrusion block (10), the outer wall of the limiting block (13) is slidably connected to the inner wall of the columnar block (7), the side wall of the mold core (6) is provided with a limiting groove (14), and the outer wall of the limiting block (13) is snap-fitted to the inner wall of the limiting groove (14).

4. The low-flow gas meter housing injection mold according to claim 1, characterized in that: The inner wall of the circular groove (3) is slidably connected to the outer wall of the column (2).

5. The low-flow gas meter housing injection mold according to claim 1, characterized in that: One end of the return spring a (12) is fixedly connected to the outer wall of the extrusion block (10), and the other end of the return spring a (12) is fixedly connected to the inner wall of the columnar block (7).

6. The low-flow gas meter housing injection mold according to claim 1, characterized in that: The inclined surface of the extrusion block (10) is slidably connected to the side wall of the rectangular plate (9), and the side wall of the rectangular plate (9) is clamped to the inner wall of the notch (11).

7. The low-flow gas meter housing injection mold according to claim 2, characterized in that: The outer wall of the ejector pin (17) is slidably connected to the inner wall of the lower mold plate (1), and the outer wall of the ejector pin (17) is slidably connected to the inner wall of the mold core (6).

8. The low-flow gas meter housing injection mold according to claim 2, characterized in that: The handle (20) and the outer wall of the center rod (18) are both slidably connected to the inner wall of the lower template (1).

9. The low-flow gas meter housing injection mold according to claim 2, characterized in that: One end of the return spring b (21) is fixedly connected to the inner wall of the handle (20), and the other end of the return spring b (21) is fixedly connected to the bottom end of the clamping block (22).

10. The low-flow gas meter housing injection mold according to claim 2, characterized in that: The outer wall of the clamping block (22) is clamped with the inner wall of the clamping slot (23).

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