Push plate capable of quickly adjusting stroke of valve needle

Abstract

The utility model relates to the technical field of push plates, in particular to a push plate capable of quickly adjusting the stroke of valve needles, a needle valve group comprises a plurality of valve needles, the valve needles are arranged in a valve shell group in a sliding manner, the tail ends of the valve needles extend out of the valve shell group, the push plate group is arranged in the valve shell group, the push plate group comprises a plurality of cushion blocks, and the cushion blocks are different in thickness; when the cushion blocks with different thicknesses move to the position above the valve needle and move downwards, the cushion blocks extrude the valve needle downwards to enable the valve needle to stretch out by different lengths, so that the stroke of the valve needle is adjusted, the number of the reset sets is multiple, and the reset sets are all located around the valve needle and the cushion blocks and used for resetting the valve needle and the cushion blocks. When the positioning rings marked with different colors on the surface of the plate rotate to the outer wall of the valve shell, the thickness value of the cushion block moved to the position over the needle cylinder and the stroke value of the valve needle do not need to open the valve shell, operation is easy, time is saved, and the injection molding efficiency can be improved; when the electric cylinder retracts, the cushion block and the valve needle are reset through the reset set.

Description

TECHNICAL FIELD

[0001] The utility model relates to push plate technical field, especially for the push plate of quick -witted adjustable valve needle stroke. BACKGROUND

[0002] The push plate in the hot runner system generally refers to the assembly for installing and pushing the valve needle, which allows the operator to adjust the moving distance (i.e. stroke) of the valve needle to accurately control the flow of plastic melt through the mold gate and to open or close the injection hole through the valve needle. In the hot runner system, the valve needle is usually installed at a fixed position, and the opening and closing actions are realized through hydraulic, pneumatic or electric drivers. The push plate with adjustable stroke increases flexibility for this process, allowing users to change the position of the valve needle when fully extended within a certain range.

[0003] Most of the push plates with adjustable valve needle stroke rely on changing the thickness of the pad to adjust the stroke of the valve needle. However, when different thickness pads need to be replaced, the needle valve seat needs to be opened, which is complex to operate and wastes time, and is not conducive to improving the injection efficiency. SUMMARY

[0004] The main purpose of the utility model is to provide a push plate with quick adjustment of valve needle stroke to solve the problem of replacing the pad by opening the needle valve seat in related technology.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, a push plate with quick adjustment of valve needle stroke is provided, comprising: a valve shell group, which is used to protect and support the push plate group and the needle valve group;

[0006] The needle valve group comprises a plurality of valve needles, which are arranged in the valve shell group and extend out of the valve shell group at the end;

[0007] The push plate group is arranged in the valve shell group and comprises a plurality of pads with different thicknesses, which can press the valve needle downward when moved above the valve needle and downward, so as to make the valve needle extend different lengths;

[0008] The reset group has a plurality of reset groups, which are arranged around the valve needle and the pad to reset the valve needle and the pad.

[0009] Further, the valve shell group comprises a valve shell and a comparison plate, and the comparison plate is fixedly arranged on the outer sidewall of the valve shell.

[0010] Further, the needle valve group further comprises a bottom plate, a plurality of guide rails and a plurality of needle cylinders, the bottom plate is fixedly arranged in the valve shell, the guide rails are fixedly arranged on the upper surface of the bottom plate, the needle cylinders are fixedly connected with the bottom plate at the top end and fixedly connected with the bottom surface of the valve shell at the bottom end, the needle cylinder is internally provided with a cavity, and the valve needle is located in the cavity and is in sliding connection with the needle cylinder.

[0011] Further, the push plate group further comprises a knob group and a plate group, the knob group comprises a screw rod, a knob and a plurality of positioning rings, the plate group comprises a push plate, a plurality of needle channels and a plurality of guide grooves, the guide grooves are arranged on the lower surface of the push plate and are in sliding connection with the guide rails, the needle channels are arranged on the push plate, the gaskets are located in the needle channels and are in sliding connection with the needle channels, one end of the screw rod is rotatably connected with the side wall of the push plate, the other end of the screw rod is fixedly connected with the knob, the end of the screw rod connected with the knob is rotatably connected with the valve shell, and the positioning rings are fixedly arranged on the outer circle of the screw rod.

[0012] Further, the reset group comprises an upper supporting plate, a spring and a lower supporting plate, one end of the upper supporting plate around the gasket is fixedly connected with the gasket, the other end of the upper supporting plate is in sliding connection with the push plate, the lower supporting plate is fixedly connected with the push plate, the top end of the spring is fixedly connected with the upper supporting plate, and the bottom end of the spring is fixedly connected with the lower supporting plate.

[0013] Further, one end of the upper supporting plate around the valve needle is fixedly connected with the valve needle, the other end of the upper supporting plate is in sliding connection with the needle cylinder, the lower supporting plate is fixedly connected with the needle cylinder, the top end of the spring is fixedly connected with the upper supporting plate, and the bottom end of the spring is fixedly connected with the lower supporting plate.

[0014] Further, the electric cylinder is fixedly arranged on the top surface in the valve shell, and the electric cylinder is used for driving the gasket to move downwards.

[0015] Compared with the prior art, the utility model has the advantages that when the gaskets with different thicknesses are moved above the valve needle and move downwards, the gaskets extrude the valve needle downwards, the valve needle extends different lengths, the stroke of the valve needle is adjusted, the valve shell does not need to be opened, the operation is simple, time is saved, and the injection efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall schematic view of the utility model;

[0017] Figure 2 It is the sectional view of the utility model;

[0018] Figure 3 It is the push plate group structure schematic view of the utility model;

[0019] Figure 4 is a schematic diagram of the needle valve group structure of the utility model;

[0020] Figure 5 is a schematic diagram of the reset group structure of the utility model.

[0021] Illustration:

[0022] 1, valve shell group; 11, valve shell; 12, comparison plate;

[0023] 2, push plate group; 21, push plate; 22, needle path; 23, cushion block; 24, guide groove; 25, screw rod; 26, knob; 27, positioning ring;

[0024] 3, needle valve group; 31, bottom plate; 32, guide rail; 33, needle cylinder; 34, valve needle;

[0025] 4, electric cylinder;

[0026] 5, reset group; 51, upper support plate; 52, spring; 53, lower support plate. DETAILED DESCRIPTION

[0027] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model will be described in detail as follows in combination with the drawings and preferred embodiments.

[0028] Please refer to Figures 1 to 5 The embodiment provides a push plate capable of quickly adjusting the stroke of a valve needle, comprising: a valve shell group 1, which is used for protecting and supporting a push plate group 2 and a needle valve group 3;

[0029] The needle valve group 3 comprises a plurality of valve needles 34, the valve needles 34 are arranged in the valve shell group 1 in a sliding manner, and the valve needles 34 extend out of the valve shell group 1 at the ends;

[0030] The push plate group 2 is arranged in the valve shell group 1, and the push plate group 2 comprises a plurality of cushion blocks 23, the thicknesses of the cushion blocks 23 are different, when the cushion blocks 23 with different thicknesses are moved above the valve needles 34 and are moved downward, the cushion blocks 23 extrude the valve needles 34 downward, so that the valve needles 34 extend by different lengths;

[0031] The reset group 5 is arranged around the valve needles 34 and the cushion blocks 23, and is used for resetting the valve needles 34 and the cushion blocks 23.

[0032] The valve shell group 1 comprises a valve shell 11 and a comparison plate 12, and the comparison plate 12 is fixedly arranged on the outer sidewall of the valve shell 11.

[0033] The surface of the comparison plate 12 is marked with positioning rings 27 of different colors, the thickness value of the pad block 23 corresponding to the positioning ring 27 moved to the upper side of the needle cylinder 33, and the stroke value of the valve needle 34 when the positioning ring 27 is moved to the outer wall of the valve shell 11.

[0034] The needle valve group 3 further comprises a bottom plate 31, a plurality of guide rails 32 and a plurality of needle cylinders 33, the bottom plate 31 is fixedly arranged in the interior of the valve shell 11, the guide rails 32 are all fixedly arranged on the upper surface of the bottom plate 31, the top ends of the needle cylinders 33 are fixedly connected with the bottom plate 31, and the bottom ends are fixedly connected with the bottom surface of the valve shell 11, the needle cylinders 33 are internally provided with cavities, the valve needles 34 are located in the cavities and are in sliding connection with the needle cylinders 33.

[0035] The push plate group 2 further comprises a knob group and a plate group, the knob group comprises a lead screw 25, a knob 26 and a plurality of positioning rings 27, the plate group comprises a push plate 21, a plurality of needle channels 22 and a plurality of guide grooves 24, the guide grooves 24 are all arranged on the lower surface of the push plate 21 and are in sliding connection with the guide rails 32, the needle channels 22 all pass through the push plate 21, the pad blocks 23 are all located in the needle channels 22 and are in sliding connection with the needle channels 22, one end of the lead screw 25 is rotatably connected with the side wall of the push plate 21, the other end is fixedly connected with the knob 26, the end of the lead screw 25 connected with the knob 26 is rotatably connected with the valve shell 11, and the positioning rings 27 are all fixedly arranged on the outer circle of the lead screw 25.

[0036] The reset group 5 comprises an upper supporting plate 51, a spring 52 and a lower supporting plate 53, one end of the upper supporting plate 51 around the pad block 23 is fixedly connected with the pad block 23, the other end is in sliding connection with the push plate 21, the lower supporting plate 53 is fixedly connected with the push plate 21, the top end of the spring 52 is fixedly connected with the upper supporting plate 51, and the bottom end is fixedly connected with the lower supporting plate 53.

[0037] One end of the upper supporting plate 51 around the valve needle 34 is fixedly connected with the valve needle 34, the other end is in sliding connection with the needle cylinder 33, the lower supporting plate 53 is fixedly connected with the needle cylinder 33, the top end of the spring 52 is fixedly connected with the upper supporting plate 51, and the bottom end is fixedly connected with the lower supporting plate 53.

[0038] The needle channels 22 and the needle cylinders 33 are all provided with recesses for accommodating the reset group 5, when the upper supporting plate 51 slides downward in the recess, the spring 52 is extruded to the lower supporting plate 53, so that the spring 52 is contracted, when the spring 52 rebounds, the upper supporting plate 51 is pushed upward, the pad block 23 and the valve needle 34 are reset.

[0039] The interior top surface of the valve shell 11 is fixedly provided with an electric cylinder 4, the electric cylinder 4 is used to drive the pad block 23 to move downward.

[0040] The electric cylinder 4 is started, the telescopic rod of the electric cylinder 4 is extended, the pad 23 is pushed to move downwards into the needle channel 22, and the valve needle 34 is pushed downwards, the spring 52 around the pad 23 and the valve needle 34 is compressed, the valve needle 34 is extended from the needle channel 22, is inserted into the pipeline of the gate, and the gate is closed, and the molten plastic cannot pass through the gate; the electric cylinder 4 is operated again, the telescopic rod of the electric cylinder 4 is retracted, the pad 23 is no longer pressed, the spring 52 around the pad 23 is elongated and restored, the pad 23 is pushed upwards back into the needle channel 22, after the pad 23 leaves the valve needle 34, the spring 52 around the valve needle 34 is elongated and restored, the valve needle 34 is pushed upwards back into the needle cylinder 33, the valve needle 34 leaves the gate, the gate is opened, and the molten plastic can pass through the gate; when the length of the valve needle 34 inserted into the gate needs to be changed, the knob 26 is rotated, the knob 26 drives the screw rod 25 to rotate along the side wall of the valve shell 11, the push plate 21 is pulled to move left and right, the pad 23 of different heights is moved to above the needle channel 22, and when the positioning ring 27 of different colors is rotated to the outer wall of the valve shell 11, the pad 23 of different heights corresponding to the positioning ring 27 is moved to above the needle channel 22, so that the stroke of the valve needle 34 is changed.

[0041] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments, as long as the changes or modifications do not deviate from the technical scheme of the present application. Any modification, change or modification of the above embodiments, as long as it does not deviate from the technical scheme of the present application, is still within the scope of the present application.

Claims

1. A push plate for quick adjustment of a valve needle stroke, characterized in that The utility model relates to a valve shell group (1) for protecting and supporting push plate group (2) and needle valve group (3), needle valve group (3) includes several valve needles (34), the valve needle (34) is arranged in the sliding in valve shell group (1), the valve needle (34) end protrudes valve shell group (1), push plate group (2) is arranged in valve shell group (1), and push plate group (2) includes several pads (23), the pad (23) thickness is different, when different thicknesses the pad (23) moves to the above valve needle (34) and moves down, the pad (23) extrudes valve needle (34) down, makes valve needle (34) protrude different lengths, reset group (5) has several, reset group (5) is located around valve needle (34) and pad (23), is used for the reset of valve needle (34) and pad (23). Valve shell group (1) includes valve shell (11) and comparison board (12), and comparison board (12) is fixedly arranged on the outer side wall of valve shell (11). Needle valve group (3) further includes bottom plate (31), several guide rails (32) and several needle cylinders (33), bottom plate (31) is fixedly arranged on the inner bottom plate (31) upper surface, the needle cylinder (33) top end is fixedly connected with bottom plate (31), and the bottom end is fixedly connected with the bottom surface of valve shell (11), the needle cylinder (33) is provided with a cavity, the valve needle (34) is located in the cavity, and is slidably connected with needle cylinder (33). Push plate group (2) further includes knob group and plate group, knob group includes lead screw (25), knob (26) and several positioning rings (27), plate group includes push plate (21), several needle channels (22) and several guide grooves (24), guide groove (24) is arranged on the lower surface of push plate (21) and is slidably connected with guide rail (32), needle channel (22) is arranged on the upper surface of push plate (21), pad (23) is located in needle channel (22) and is slidably connected with needle channel (22), one end of lead screw (25) is rotatably connected with the side wall of push plate (21), and the other end is fixedly connected with knob (26), the end of lead screw (25) connected with knob (26) is rotatably connected with valve shell (11), and positioning ring (27) is fixedly arranged on the outer ring of lead screw (25). Reset group (5) includes upper support plate (51), spring (52) and lower support plate (53), one end of upper support plate (51) around pad (23) is fixedly connected with pad (23), the other end is slidably connected with push plate (21), lower support plate (53) is fixedly connected with push plate (21), the top end of spring (52) is fixedly connected with upper support plate (51), and the bottom end is fixedly connected with lower support plate (53).

2. The push plate for quick setting needle stroke of a valve according to claim 1, wherein, ​ 3. The push plate for quick setting needle stroke of a valve according to claim 2, wherein, ​ 4. The push plate for quick setting needle stroke of a valve according to claim 3, wherein, ​ 5. The push plate for quick setting needle stroke of a valve according to claim 4, wherein, ​ 6. The push plate for quick setting needle stroke of a valve according to claim 5, wherein, The upper support plate (51) around the valve needle (34) is fixedly connected with one end of the valve needle (34) and is slidably connected with the other end of the needle cylinder (33), the lower support plate (53) is fixedly connected with the needle cylinder (33), the spring (52) is fixedly connected with the top end of the upper support plate (51) and is fixedly connected with the bottom end of the lower support plate (53).

7. The push plate for quick setting needle stroke of a valve according to claim 2, wherein The top surface of the valve shell (11) is fixedly provided with an electric cylinder (4), and the electric cylinder (4) is used for driving the cushion block (23) to move downwards.

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