Oil cylinder structure for hot runner mold

Abstract

The oil cylinder structure comprises a cylinder body, a piston seat, a positioning seat and a base, the bottom of the cylinder body is provided with a cavity with an opening, the cavity is provided with a stroke cavity, the side wall of the cylinder body is provided with a fluid inlet and a fluid outlet, the piston seat is provided with a guide part slidably mounted in the stroke cavity, and the positioning seat is provided with a positioning hole. A hydraulic driving cavity is defined by the guide part and the stroke cavity, the positioning seat extends into the lower portion of the stroke cavity, a guide channel matched with the piston seat is arranged in the middle of the positioning seat, the guide channel is hollow, the positioning seat is fixedly installed on the upper wall of the base, and the base is detachably installed at an opening of the cylinder body. The oil cylinder is simple in structure, good in sealing performance and stroke stability and convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the field of hot runner moulds, in particular to an oil cylinder structure used for hot runner moulds. Background Art

[0002] In the operation of hot runner molds, a cylinder is generally required to control the opening or closing of a valve needle or valve.

[0003] For example, Chinese patent 202321341788.3, ​​this type of product adopts an integrated cylinder structure, but in the event of a failure, its disassembly and assembly is also more troublesome. At the same time, it is also a big test for mold engineers during actual assembly and debugging. How to design a cylinder structure to facilitate debugging and assembly by non-designers is the key to the design. Utility Model Content

[0004] The main purpose of the utility model is to propose an oil cylinder structure for a hot runner mold, aiming to improve the existing oil cylinder structure so that it is convenient to assemble and has a stable working stroke.

[0005] To achieve the above object, the utility model proposes a cylinder structure for a hot runner mold, comprising:

[0006] A cylinder body, wherein the cylinder body is a cavity with an opening at the bottom, the cavity is provided with a stroke chamber, and the side wall of the cylinder body is provided with a fluid inlet and a fluid outlet;

[0007] A piston seat, wherein the piston seat is provided with a guide portion slidably mounted on the stroke cavity, and the guide portion and the stroke cavity form a hydraulic drive cavity;

[0008] A positioning seat, the positioning seat extends into the lower position of the stroke chamber, a guide channel matching with the piston seat is provided in the middle of the positioning seat, and the guide channel is hollow;

[0009] The base is fixedly mounted on the upper wall of the base, and the base is detachably mounted on the opening of the cylinder body.

[0010] In actual work, the valve needle is arranged at the bottom of the piston seat, and the piston seat is provided with a through hole, wherein the through hole is provided by a screw seal, so that the piston seat drives the valve needle to move and ensures the sealing performance, that is, the high-pressure oil cylinder provides pressure to the inlet, and forces the piston seat to move downward and drive the valve needle to move downward. When the liquid in the high-pressure oil cylinder flows to the fluid outlet, the piston seat is reset;

[0011] During assembly, the piston seat is connected to the valve needle, and then the piston seat is installed in the stroke cavity, and then the positioning seat and the base are fixed, and then the positioning seat is installed in the lower section of the stroke cavity, and the valve needle passes through the guide channel, and finally the base and the cylinder body are fixed by screws to complete the installation, which is convenient for the debugging of the oil cylinder, and the positioning seat and the stroke cavity are also relatively sealed, effectively ensuring the sealing of the piston seat. The oil cylinder has a simple structure, good sealing and stroke stability, and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This utility model is cut away Figure 1 ;

[0013] Figure 2 This utility model is cut away Figure 2 ;

[0014] Figure 3 This utility model is cut away Figure 3 ;

[0015] Figure 4 This is a schematic diagram of the matching between the cylinder body and the base;

[0016] Figure 5 This is a half-section diagram of the rod body and base.

[0017] In the figure, 1 is a cylinder body, 10 is a stroke chamber, 11 is a fluid inlet, 12 is a fluid outlet, 2 is a piston seat, 20 is a guide part, 21 is a hydraulic drive chamber, 3 is a positioning seat, 31 is a guide channel, 4 is a base, 51 is a positioning chamber, 52 is a positioning section, 61 is a first sealing ring, 62 is a second sealing ring, 63 is a third sealing ring, 64 is a fourth sealing ring, 71 is a driving hole, 72 is a through hole, 81 is a bump, and 82 is a guide slope. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings 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.

[0019] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0021] like Figures 1 to 5 As shown, a cylinder structure for a hot runner mold includes:

[0022] A cylinder body 1, wherein the cylinder body 1 is a cavity with an opening at the bottom, the cavity is provided with a stroke chamber 10, and the side wall of the cylinder body 1 is provided with a fluid inlet 11 and a fluid outlet 12;

[0023] A piston seat 2, wherein the piston seat 2 is provided with a guide portion 20 slidably mounted on the stroke chamber 10, and the guide portion 20 and the stroke chamber 10 enclose a hydraulic drive chamber 21;

[0024] A positioning seat 3, the positioning seat 3 extends into the lower position of the stroke chamber 10, and a guide channel 31 matching with the piston seat 2 is provided in the middle of the positioning seat 3, and the guide channel 31 is hollow;

[0025] The base 4 , the positioning seat 3 is fixedly mounted on the upper wall of the base 4 , and the base 4 is detachably mounted on the opening of the cylinder body 1 .

[0026] In actual work, the valve needle is arranged at the bottom of the piston seat 2, and the piston seat 2 is provided with a through hole 72, wherein the through hole 72 is arranged by a screw seal, so that the piston seat 2 drives the valve needle to move and ensures the sealing performance, that is, the high-pressure oil cylinder provides pressure to the inlet, and forces the piston seat 2 to move downward and drive the valve needle to move downward, and when the liquid in the high-pressure oil cylinder flows to the fluid outlet 12, the piston seat 2 is reset;

[0027] During assembly, the piston seat 2 is connected to the valve needle, and then the piston seat 2 is installed in the stroke chamber 10, and then the positioning seat 3 and the base 4 are fixed, and then the positioning seat 3 is installed in the lower section of the stroke chamber 10, and the valve needle passes through the guide channel 31, and finally the base 4 and the cylinder body 1 are fixed by screws to complete the installation, which is convenient for the debugging of the oil cylinder, and the positioning seat 3 and the stroke chamber 10 are also relatively sealed, effectively ensuring the sealing of the piston seat 2. The oil cylinder has a simple structure, good sealing and stroke stability, and is easy to assemble.

[0028] Specifically, the diameter of the guide portion 20 is larger than the outer diameter of the piston seat 2, thereby ensuring double guidance of the piston seat 2 and effectively ensuring the accuracy of the stroke.

[0029] In the embodiment of the utility model, the lower section of the stroke cavity 10 is provided with a positioning cavity 51 with an enlarged diameter, and the positioning seat 3 is provided with a positioning section 52 matching the positioning cavity 51, and the diameter of the positioning section 52 is larger than the outer diameter of the guide portion 20, thereby facilitating the installation and sealing of the positioning seat 3 and making the structure more stable.

[0030] Furthermore, a first groove is provided on the side wall of the guide portion 20 , and a first sealing ring 61 is provided in the first groove. The first sealing ring 61 partially extends out of the first groove and abuts against the inner wall of the stroke chamber 10 , thereby achieving sealing of the hydraulic drive chamber 21 .

[0031] In the embodiment of the utility model, a through hole 72 is provided in the middle of the piston seat 2, and the through hole 72 is used for installing the valve needle.

[0032] Specifically, the base 4 is provided with a driving hole 71, and the driving hole 71, the through hole 72 and the guide channel 31 are all coaxially arranged. The inner wall of the driving hole 71 is provided with a protruding block 81, thereby ensuring the stability of the stroke of the valve needle, and the setting of the block 81 can play a guiding and limiting role, thereby reducing the axis center error.

[0033] Furthermore, a second groove is provided on the upper wall of the positioning section 52 , and a second sealing ring 62 is provided in the second groove.

[0034] In the embodiment of the utility model, the outer peripheral wall of the positioning seat 3 is provided with a third clamping groove, and the third clamping groove is provided with a third sealing ring 63;

[0035] The inner wall of the guide channel 31 is provided with a fourth groove, and the fourth groove is provided with a fourth sealing ring 64. The fourth sealing ring 64 is provided with at least one, such as an O-ring, a Y-ring, etc. The sealing between the positioning seat 3 and the cylinder body 1 and the sealing between the positioning seat 3 and the piston seat 2 are ensured by the provision of the sealing ring.

[0036] In the embodiment of the utility model, the outer peripheral wall of the upper end of the positioning seat 3 is provided with a guiding inclined surface 82, so as to facilitate the installation of the positioning seat.

[0037] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A cylinder structure for a hot runner mold, characterized in that: include: A cylinder body, wherein the cylinder body is a cavity with an opening at the bottom, the cavity is provided with a stroke chamber, and the side wall of the cylinder body is provided with a fluid inlet and a fluid outlet; A piston seat, wherein the piston seat is provided with a guide portion slidably mounted on the stroke cavity, and the guide portion and the stroke cavity form a hydraulic drive cavity; A positioning seat, the positioning seat extends into the lower position of the stroke chamber, a guide channel matching with the piston seat is provided in the middle of the positioning seat, and the guide channel is hollow; The base is fixedly mounted on the upper wall of the base, and the base is detachably mounted on the opening of the cylinder body.

2. The oil cylinder structure for hot runner mold according to claim 1, characterized in that: The diameter of the guide portion is greater than the outer diameter of the piston seat.

3. The oil cylinder structure for hot runner mold according to claim 1, characterized in that: The lower section of the stroke cavity is provided with a positioning cavity with an enlarged diameter, and the positioning seat is provided with a positioning section matched with the positioning cavity, and the diameter of the positioning section is larger than the outer diameter of the guide portion.

4. The oil cylinder structure for hot runner mold according to claim 1, characterized in that: The side wall of the guide portion is provided with a first clamping groove, the first clamping groove is provided with a first sealing ring, and the first sealing ring part extends out of the first clamping groove and abuts against the inner wall of the stroke chamber.

5. The oil cylinder structure for hot runner mold according to claim 1, characterized in that: A through hole is provided in the middle of the piston seat, and the through hole is used for installing a valve needle.

6. The oil cylinder structure for hot runner mold according to claim 5, characterized in that: The base is provided with a driving hole, and the driving hole, the through hole and the guide channel are all coaxially arranged, and the inner wall of the driving hole is provided with a protruding bump.

7. The oil cylinder structure for hot runner mold according to claim 3, characterized in that: The upper wall of the positioning section is provided with a second clamping groove, and the second clamping groove is provided with a second sealing ring.

8. The oil cylinder structure for hot runner mold according to claim 7, characterized in that: The outer peripheral wall of the positioning seat is provided with a third clamping groove, and the third clamping groove is provided with a third sealing ring; The inner wall of the guide channel is provided with a fourth clamping groove, and the fourth clamping groove is provided with a fourth sealing ring.

9. The oil cylinder structure for hot runner mold according to claim 1, characterized in that: The outer peripheral wall at the upper end of the positioning seat is provided with a guiding inclined surface.

Images