A cylinder assembly for a hot runner system of an injection mold

Abstract

The utility model discloses a cylinder assembly of a hot runner system for an injection mold, and relates to the technical field of hot runner systems for injection molds. The utility model includes a horizontally arranged drive bar and a cylinder arranged vertically side by side above the drive bar; a T-shaped slot is provided on the lower surface of the drive bar along the length direction; a plurality of valve needles are vertically connected side by side in the T-shaped slot; the cylinder includes a support seat and a cylinder body vertically fixed to the top of the support seat; a chamber is arranged in the cylinder body; the chamber passes through the bottom of the cylinder body; a base is horizontally arranged in the lower part of the chamber; a piston is horizontally arranged above the base; the piston slides in the chamber; a piston rod is vertically fixed on the piston; the lower end of the piston rod slides through the base and the support seat in turn and is fixed on the drive bar. The utility model can not only mount multiple valve needles, but also avoid the problem of mutual interference of cylinders when the arrangement distance of the mold cavity positioning is too close.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot runner systems for injection molds, in particular to a cylinder component of a hot runner system for an injection mold. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the required products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. They are tools that make the blank into a part with a specific shape and size under the action of external force.

[0003] In the hot runner system of injection molds, the existing cylinders are limited by the structure, size and distance of the injection point of the mold arrangement. When the arrangement distance of the mold cavity positioning is too close, the cylinders interfere with each other and cannot be arranged; and one cylinder cannot mount multiple valve needles. Therefore, it is urgent to study a cylinder component of the hot runner system of injection molds to solve the above problems. Utility Model Content

[0004] The utility model provides a cylinder component of a hot runner system of an injection mold, and its purpose is to solve the technical problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a cylinder assembly of a hot runner system of an injection mold, comprising a horizontally arranged driving strip and a cylinder arranged vertically side by side above the driving strip; a T-shaped groove is provided on the lower surface of the driving strip along the length direction; a plurality of valve needles are vertically connected side by side in the T-shaped groove; the cylinder comprises a support seat and a cylinder body vertically fixed to the top of the support seat; a chamber is provided in the cylinder body; the chamber passes through the bottom of the cylinder body; a base is horizontally provided in the lower part of the chamber; a piston is horizontally provided above the base; the piston is slidably fitted in the chamber; a piston rod is vertically fixed on the piston; the lower end of the piston rod slides through the base and the supporting seat in turn and is fixed on the driving strip; a plurality of first inlet and outlet holes connected to the chamber are vertically provided on the top wall of the cylinder body along the annular direction; a first external expansion groove is horizontally provided on the inner side surface of the chamber; the first external expansion groove is provided between the base and the piston; a plurality of second inlet and outlet holes are vertically provided on the upper surface of the first external expansion groove; the upper ends of the plurality of second inlet and outlet holes all pass through the top wall of the cylinder body.

[0007] As a preferred technical solution of the utility model, a first annular groove and a second annular groove are coaxially arranged on the upper surface of the top wall of the cylinder body; the first annular groove is arranged on the inner side of the second annular groove; the first annular groove is connected to the upper ends of multiple first air inlet and outlet holes; the second annular groove is connected to the upper ends of multiple second air inlet and outlet holes; a first sealing ring is coaxially arranged on the inner side of the first annular groove, between the first annular groove and the second annular groove, and on the outer side of the second annular groove; the three first sealing rings are all embedded in the upper surface of the top wall of the cylinder body.

[0008] As a preferred technical solution of the utility model, a second outward expansion groove is horizontally opened on the inner side surface of the chamber; the second outward expansion groove is arranged between the support seat and the base; a retaining spring is horizontally installed in the second outward expansion groove; the upper surface of the retaining spring is in conflict with the bottom surface of the base.

[0009] As a preferred technical solution of the utility model, a second sealing ring is horizontally sleeved on the outer periphery of the base; the second sealing ring is in conflict with the inner side surface of the chamber.

[0010] As an optimal technical solution of the utility model, the upper end of the piston rod is slidably inserted into the top wall of the cylinder body; the outer circumference of the piston rod is sequentially sleeved with a first grid ring, a guide ring and a second grid ring from top to bottom; the first grid ring is arranged in the top wall of the cylinder body; the guide ring and the second grid ring are arranged in the piston; the outer circumference of the piston is sleeved with a third grid ring; the third grid ring is in conflict with the inner side surface of the chamber; a bolt is vertically inserted into the piston rod; a connecting block is fixed to the lower end of the bolt; the connecting block is fixed to the driving bar; a headless screw is vertically arranged above the bolt; the headless screw is inserted into the upper end of the piston rod; the headless screw is threadedly matched with the piston rod.

[0011] The utility model has the following beneficial effects:

[0012] The utility model causes the piston to move downward in the chamber by taking in air through the first air inlet and outlet and exhausting air through the second air inlet and outlet, so that the piston rod drives multiple valve needles to move downward synchronously via the driving bar. Since the first air inlet and outlet and the second air inlet and outlet are both arranged on the top wall of the cylinder body, the installation distance between two adjacent cylinders can be shortened. Not only can multiple valve needles be mounted, but also the problem of mutual interference between cylinders when the arrangement distance of the mold cavity positioning is too close, which exists in the prior art, is avoided. The utility model has a high market application value.

[0013] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 The utility model is a structural schematic diagram of a cylinder component of a hot runner system of an injection mold.

[0016] Figure 2 for Figure 1 Side view of the structure.

[0017] Figure 3 It is a schematic diagram of the explosion structure of the cylinder of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the cylinder body of the utility model.

[0019] Figure 5 for Figure 4 The main view of the structure.

[0020] Figure 6 It is a structural schematic diagram of the base of the utility model.

[0021] Figure 7 It is a structural schematic diagram of the piston of the utility model.

[0022] Figure 8 It is a structural schematic diagram of the driving bar of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1-cylinder, 2-drive bar, 3-valve needle, 101-support seat, 102-cylinder body, 103-chamber, 104-base, 105-piston, 106-piston rod, 107-first inlet and outlet holes, 108-first external expansion groove, 109-second inlet and outlet holes, 110-first annular groove, 111-second annular groove, 112-first sealing ring, 113-first grid ring, 114-second external expansion groove, 115-circlip, 116-second sealing ring, 117-second grid ring, 118-guide ring, 119-third grid ring, 120-bolt, 121-connecting block, 122-headless screw, 201-T-slot. DETAILED DESCRIPTION

[0025] 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 of 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.

[0026] Example:

[0027] See also Figure 1-8 As shown, the utility model is a cylinder assembly of a hot runner system of an injection mold, comprising a horizontally arranged driving strip 2 and a cylinder 1 arranged vertically side by side above the driving strip 2; a T-slot 201 is provided on the lower surface of the driving strip 2 along the length direction; a plurality of conventional valve needles 3 in the field are vertically connected side by side in the T-slot 201; a plurality of screws corresponding to the valve needles 3 are vertically connected side by side on the driving strip 2; the lower ends of the screws are in conflict with the upper surfaces of the valve needles 3; the cylinder 1 comprises a support seat 101 and a cylinder body 102 vertically fixed to the top of the support seat 101; the support seat 101 is connected to a diverter plate or a template by bolts; a chamber 103 with a cylindrical structure is arranged in the cylinder body 102; the chamber 103 passes through the bottom of the cylinder body 102; a Base 104; a piston 105 is horizontally arranged above the base 104; the piston 105 is slidably fitted in the chamber 103; a piston rod 106 is vertically welded to the piston 105; the lower end of the piston rod 106 slides through the base 104 and the support seat 101 in turn and is fixed on the drive bar 2; a plurality of first inlet and outlet holes 107 connected to the chamber 103 are vertically opened on the top wall of the cylinder body 102 along a circular direction; a first outer expansion groove 108 with an annular structure is horizontally opened on the inner side surface of the chamber 103; the first outer expansion groove 108 is arranged between the base 104 and the piston 105; a plurality of second inlet and outlet holes 109 are vertically opened on the upper surface of the first outer expansion groove 108; the plurality of second inlet and outlet holes 109 all penetrate the side wall of the cylinder body 102 and all penetrate the top wall of the cylinder body 102. When in use, air is taken in through the first air inlet and outlet 107 and exhausted through the second air inlet and outlet 109, so that the piston 105 moves downward in the chamber 103, and the piston rod 106 drives the multiple valve needles 3 to move downward synchronously through the drive bar 2. Since the first air inlet and outlet 107 and the second air inlet and outlet 109 are both arranged on the top wall of the cylinder body 102, the installation distance between two adjacent cylinders 1 can be shortened, which not only can mount multiple valve needles, but also avoids the problem of mutual interference between cylinders when the arrangement distance of the mold cavity positioning is too close; on the contrary, air is taken in through the second air inlet and outlet 109 and exhausted through the first air inlet and outlet 107, so that the piston 105 moves upward in the chamber 103, and the piston rod 106 drives the multiple valve needles 3 to reset upward synchronously through the drive bar 2.

[0028] Among them Figure 4-5 As shown, the upper surface of the top wall of the cylinder body 102 is provided with a first annular groove 110 and a second annular groove 111 which are coaxially arranged; the first annular groove 110 is arranged inside the second annular groove 111; the first annular groove 110 is connected to the upper ends of the plurality of first air inlet and outlet holes 107; the second annular groove 111 is connected to the upper ends of the plurality of second air inlet and outlet holes 109; the inner side of the first annular groove 110, between the first annular groove 110 and the second annular groove 111, and the outer side of the second annular groove 111 are all coaxially provided with a conventional first sealing ring 112 in the art; the three first sealing rings 112 are all embedded in the upper surface of the top wall of the cylinder body 102. When in use, the air supply or exhaust of the first air inlet and outlet holes 107 and the second air inlet and outlet holes 109 is realized by connecting the air delivery pipe to the first air inlet and outlet holes 107 and the second air inlet and outlet holes 109 respectively.

[0029] Among them Figure 5-6 As shown, the inner side surface of the chamber 103 is horizontally provided with a second outer expansion groove 114 in an annular structure; the second outer expansion groove 114 is arranged between the support seat 101 and the base 104; a conventional retaining ring 115 in the art is horizontally installed in the second outer expansion groove 114; the upper surface of the retaining ring 115 conflicts with the bottom surface of the base 104; a conventional second sealing ring 116 in the art is horizontally sleeved on the outer periphery of the base 104; the second sealing ring 116 conflicts with the inner side surface of the chamber 103. By arranging the retaining ring 115 in the second outer expansion groove 114, the base 104 can be effectively limited; at the same time, by sleeved the second sealing ring 116 on the outer periphery of the base 104, the sealing of the chamber 103 can be ensured.

[0030] Among them Figure 5-8As shown, the upper end of the piston rod 106 is slidably inserted into the top wall of the cylinder body 102; the outer circumference of the piston rod 106 is sequentially sleeved with a conventional first grid ring 113, a conventional guide ring 118 and a conventional second grid ring 117 in the art from top to bottom; the first grid ring 113 is arranged in the top wall of the cylinder body 102; the guide ring 118 and the second grid ring 117 are arranged in the piston 105; the outer circumference of the piston 105 is sleeved with a conventional third grid ring 119 in the art; the third grid ring 119 abuts against the inner side surface of the chamber 103. touch; a conventional bolt 120 in the field is vertically inserted into the piston rod 106; the piston rod 106 and the bolt 120 are clearance-matched; a step surface for limiting the top cap of the bolt 120 is provided in the piston rod 106; the lower end of the bolt 120 is threadedly connected with a connecting block 121; the connecting block 121 is threadedly connected to the drive bar 2; a headless screw 122 for limiting the bolt 120 is vertically provided above the bolt 120; the headless screw 122 is inserted into the upper end of the piston rod 106; the headless screw 122 and the piston rod 106 are threadedly matched. By sequentially sleeved the first grid ring 113, the guide ring 118 and the second grid ring 117 on the outer circumference of the piston rod 106 from top to bottom, the movement stability of the piston rod 106 can be ensured, and by sleeved the third grid ring 119 on the outer circumference of the piston 105, the sealing of the chamber 103 can be ensured. At the same time, by vertically inserting a bolt 120 in the piston rod 106, the bolt 120 is connected to the drive bar 2 through a connecting block 121, and the internal thread of the piston rod 106 is equipped with a headless screw 122 for limiting the bolt 120, which can facilitate the assembly between the cylinder 1 and the drive bar 2, and effectively ensure the use effect of the entire cylinder assembly.

[0031] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A cylinder assembly for a hot runner system of an injection mold, characterized in that: It comprises a horizontally arranged driving bar (2) and a cylinder (1) arranged vertically and side by side above the driving bar (2); a T-shaped groove (201) is provided on the lower surface of the driving bar (2) along the length direction; a plurality of valve needles (3) are vertically connected side by side in the T-shaped groove (201); The cylinder (1) comprises a support seat (101) and a cylinder body (102) vertically fixed to the top of the support seat (101); a chamber (103) is arranged in the cylinder body (102); the chamber (103) passes through the bottom of the cylinder body (102); a base (104) is horizontally arranged in the lower part of the chamber (103); a piston (105) is horizontally arranged above the base (104); the piston (105) is slidably fitted in the chamber (103); a piston rod (106) is vertically fixed on the piston (105); the lower end of the piston rod (106) slides through the chamber (103) in sequence The base (104) and the support base (101) are fixed on the driving bar (2); a plurality of first air inlet and outlet holes (107) connected to the chamber (103) are vertically opened on the top wall of the cylinder body (102) in an annular direction; a first external expansion groove (108) is horizontally opened on the inner side surface of the chamber (103); the first external expansion groove (108) is arranged between the base (104) and the piston (105); a plurality of second air inlet and outlet holes (109) are vertically opened on the upper surface of the first external expansion groove (108); the upper ends of the plurality of second air inlet and outlet holes (109) all pass through the top wall of the cylinder body (102).

2. The cylinder assembly of the hot runner system of an injection mold according to claim 1, characterized in that: A first annular groove (110) and a second annular groove (111) are coaxially arranged on the upper surface of the top wall of the cylinder body (102); the first annular groove (110) is arranged on the inner side of the second annular groove (111); the first annular groove (110) is connected to the upper ends of the plurality of first air inlet and outlet holes (107); and the second annular groove (111) is connected to the upper ends of the plurality of second air inlet and outlet holes (109).

3. The cylinder assembly of the hot runner system of an injection mold according to claim 2, characterized in that: First sealing rings (112) are coaxially arranged on the inner side of the first annular groove (110), between the first annular groove (110) and the second annular groove (111), and on the outer side of the second annular groove (111); the three first sealing rings (112) are all embedded in the upper surface of the top wall of the cylinder body (102).

4. The cylinder assembly of the hot runner system of an injection mold according to claim 2 or 3, characterized in that: A second outward expansion groove (114) is horizontally opened on the inner side surface of the chamber (103); the second outward expansion groove (114) is arranged between the support seat (101) and the base (104); a retaining spring (115) is horizontally installed in the second outward expansion groove (114); the upper surface of the retaining spring (115) is in contact with the bottom surface of the base (104).

5. The cylinder assembly of the hot runner system of an injection mold according to claim 4, characterized in that: A second sealing ring (116) is horizontally sleeved on the outer periphery of the base (104); the second sealing ring (116) is in contact with the inner side surface of the chamber (103).

6. The cylinder assembly of the hot runner system of an injection mold according to claim 1, characterized in that: The upper end of the piston rod (106) is slidably inserted into the top wall of the cylinder body (102); the outer circumference of the piston rod (106) is sequentially sleeved with a first grid ring (113), a guide ring (118) and a second grid ring (117) from top to bottom; the first grid ring (113) is arranged in the top wall of the cylinder body (102); the guide ring (118) and the second grid ring (117) are arranged in the piston (105); the outer circumference of the piston (105) is sleeved with a third grid ring (119); the third grid ring (119) is in contact with the inner side surface of the chamber (103).

7. The cylinder assembly of the hot runner system of an injection mold according to claim 6, characterized in that: A bolt (120) is vertically inserted into the piston rod (106); a connecting block (121) is fixed to the lower end of the bolt (120); the connecting block (121) is fixed to the driving bar (2); a headless screw (122) is vertically arranged above the bolt (120); the headless screw (122) is inserted into the upper end of the piston rod (106); the headless screw (122) and the piston rod (106) are threadedly matched.

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