In-mold cutting device

Abstract

The utility model discloses an in-mold cutting device which comprises an oil cylinder base, the oil cylinder base is installed on one side of a mold template, a miniature oil cylinder inner cavity is formed in the end, facing the mold template, of the oil cylinder base, and a movable miniature high-pressure oil cylinder is installed in the miniature oil cylinder inner cavity. The first axial end of the miniature high-pressure oil cylinder is connected with one end of a cut-off component in the mold template, the outer side of the cut-off component is sleeved with a reset spring abutting against the mold template, and an oil inlet runner communicated with an inner oil way of the mold template is arranged in the oil cylinder base. The oil cylinder seat and the miniature high-pressure oil cylinder are combined to form a die internally-tangent structure which is small in size and high in speed, and an oil way in a die template can be utilized for control, so that the die internally-tangent structure is simple and fast.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an in-mold cutting device. Background Technology

[0002] In injection molding, to enhance competitiveness, mold manufacturers often use in-mold cutting structures to cut off the gate. The traditional method involves using a large hydraulic cylinder locked to the mother mold plate, with oil flowing through the cylinder to cut the gate. However, traditional hydraulic cylinders are too large, often unable to fit in the limited space of smaller molds. Enlarging the mold requires a larger injection molding machine, increasing costs. Furthermore, the cutting speed of traditional cylinders is often insufficient, frequently resulting in gates not being completely cut off or rough cut surfaces, affecting product quality and requiring manual trimming, increasing labor costs. Moreover, the slow cutting speed often leads to incomplete cuts, which is often addressed by increasing the cylinder diameter, further increasing mold costs. Therefore, a new in-mold cutting structure is needed to solve this technical problem. Utility Model Content

[0003] This invention provides an in-mold cutting device that can solve the problem that existing injection molding machines can only use large hydraulic cylinders to cut the gate inside the injection mold, resulting in the inability to install small molds and increased costs.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an in-mold cutting device, including a cylinder seat, which is installed on one side of a mold template. A miniature cylinder cavity is provided at one end of the cylinder seat facing the mold template. A movable miniature high-pressure cylinder is installed inside the miniature cylinder cavity. The first axial end of the miniature high-pressure cylinder is connected to one end of a cutting component inside the mold template. A return spring is sleeved on the outside of the cutting component, abutting against the mold template. An oil inlet channel is provided inside the cylinder seat, communicating with the internal oil passage of the mold template. The oil inlet channel is connected to the miniature cylinder cavity at the second axial end of the miniature high-pressure cylinder. By combining the cylinder seat and the miniature high-pressure cylinder, a relatively small and fast in-mold cutting structure can be formed. Furthermore, it can be controlled using the internal oil passage of the mold template, making it simple and quick.

[0005] Preferably, the cutting component includes a connecting rod coaxially arranged with the miniature high-pressure cylinder and a cutting blade installed at one end of the connecting rod. The return spring is sleeved on the outside of the connecting rod. The connecting rod can be set using the space inside the mold template, and its structure is conducive to the installation and use of the return spring.

[0006] Preferably, a limiting screw connected to a miniature high-pressure hydraulic cylinder is inserted into the rear end of the cylinder seat. The limiting screw includes a screw rod connected to the miniature high-pressure hydraulic cylinder and a nut seat located at one end of the screw rod. The nut seat is embedded in a countersunk hole on the rear side of the cylinder seat. The ejection stroke of the miniature high-pressure hydraulic cylinder can be precisely controlled by the limiting screw, so that the cutting component can accurately cut off the gate without damaging the mold.

[0007] Preferably, the limiting screw passes laterally through the oil inlet channel, and a sealing gasket is installed between the nut seat of the limiting screw and the countersunk hole on the rear side of the cylinder seat. This makes reasonable use of space and the sealing gasket can prevent hydraulic oil leakage in the oil inlet channel.

[0008] Preferably, the oil inlet channel includes a transverse channel connected to the internal oil passage of the mold template and a vertical channel arranged vertically on the rear side of the inner cavity of the micro cylinder. The vertical channel is connected to the inner cavity of the micro cylinder, which facilitates the processing of the oil inlet channel.

[0009] Preferably, the lower end of the vertical flow channel extends to the lower end face of the cylinder seat and is sealed by a plug screw, which facilitates processing and allows hydraulic oil to be introduced after the plug screw is removed.

[0010] Preferably, an end face sealing ring is installed between the cylinder seat and the mold template around the oil inlet channel to ensure sealing.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] With a simple structure, the combination of the hydraulic cylinder seat and the miniature high-pressure hydraulic cylinder can form a mold internal cutting structure that is relatively small in size and fast in speed. Moreover, it can be controlled by the oil circuit inside the mold template, which is simple and quick. This solves the problem that existing injection molding machines can only use large hydraulic cylinders to cut the gate inside the injection mold, resulting in the inability to install small molds and increased costs. Attached Figure Description

[0013] Figure 1 This is a side view of the present invention.

[0014] Figure 2 for Figure 1 AA-direction sectional view of the structure.

[0015] Figure label:

[0016] 1. Cylinder seat; 11. Cutting knife; 12. Vertical flow channel; 13. Horizontal flow channel; 14. Sealing gasket; 2. Miniature cylinder inner cavity; 3. Miniature high-pressure cylinder; 4. Limit screw; 5. Plug screw; 6. Oil inlet flow channel; 7. End face sealing ring; 8. Connecting rod; 9. Return spring; 10. Mold template. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] like Figure 1-2 As shown, this utility model addresses the problem that existing injection molding machines can only use large hydraulic cylinders to cut the gate inside the injection mold, resulting in the inability to install small molds and increased costs. The following technical solution is provided: an in-mold cutting device, including a cylinder seat 1, which is installed on one side of a mold template 10. A miniature hydraulic cylinder cavity 2 is provided at the end of the cylinder seat 1 facing the mold template 10. A movable miniature high-pressure hydraulic cylinder 3 is installed inside the miniature high-pressure hydraulic cylinder 3. The first axial end of the miniature high-pressure hydraulic cylinder 3 is connected to one end of a cutting component inside the mold template 10. A return spring 9 is sleeved on the outside of the cutting component, abutting against the mold template 10. An oil inlet channel 6 is provided inside the cylinder seat 1, communicating with the internal oil passage of the mold template 10. The oil inlet channel 6 is connected to the miniature hydraulic cylinder cavity 2 at the second axial end of the miniature high-pressure hydraulic cylinder 3. By combining the cylinder seat 1 and the miniature high-pressure hydraulic cylinder 3, a relatively small and fast in-mold cutting structure can be formed. Furthermore, it can be controlled using the oil passage inside the mold template 10, making it simple and quick.

[0019] Specifically, the size of the cylinder seat 1 can be customized according to the size of the mold template 10, so that there is space to install it on the side of the mold template 10. The miniature high-pressure cylinder 3 can move quickly after the hydraulic oil enters its second axial end. It is fast and powerful. The cutting component can adopt the existing structure or be modified and adjusted according to the structure of the miniature high-pressure cylinder 3. The gate cut by the cutting component is flat and smooth, not rough, and does not require subsequent secondary processing.

[0020] As a specific structure in this embodiment, such as Figure 2 As shown, the cutting component includes a connecting rod 8 coaxially arranged with the miniature high-pressure cylinder 3 and a cutting blade 11 installed at one end of the connecting rod 8. The return spring 9 is sleeved on the outside of the connecting rod 8. The connecting rod 8 can be set using the space inside the mold template 10, and its structure is conducive to the installation and use of the return spring 9.

[0021] Meanwhile, to make the cutting more precise, a limiting screw 4 connected to a miniature high-pressure hydraulic cylinder 3 is inserted into the rear end of the cylinder seat 1. The limiting screw 4 includes a screw rod connected to the miniature high-pressure hydraulic cylinder 3 and a nut seat located at one end of the screw rod. The nut seat is embedded in the countersunk hole on the rear side of the cylinder seat 1. The limiting screw 4 allows for precise control of the ejection stroke of the miniature high-pressure hydraulic cylinder 3, enabling the cutting component to accurately cut the gate without damaging the mold. The limiting screw 4 can pass laterally through the oil inlet channel 6, and a sealing gasket 14 is installed between the nut seat of the limiting screw 4 and the countersunk hole on the rear side of the cylinder seat 1. This makes efficient use of space, and the sealing gasket 14 prevents hydraulic oil leakage in the oil inlet channel 6.

[0022] As a specific structure of the oil inlet channel 6, the oil inlet channel 6 includes a transverse channel 13 connected to the internal oil passage of the mold template 10 and a vertical channel 12 vertically arranged on the rear side of the inner cavity 2 of the micro cylinder. The vertical channel 12 is connected to the inner cavity 2 of the micro cylinder, which facilitates the processing of the oil inlet channel 6. Specifically, the lower end of the vertical channel 12 extends to the lower end face of the cylinder seat 1 and is sealed by a plug screw 5, which facilitates processing. Hydraulic oil can also be introduced after the plug screw 5 is removed.

[0023] To prevent hydraulic oil leakage between the cylinder seat 1 and the mold template 10, an end face sealing ring 7 is installed around the oil inlet channel 6 between the cylinder seat 1 and the mold template 10 to ensure sealing.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. An in-mold cutting device, characterized in that, The system includes a cylinder seat (1), which is installed on one side of the mold template (10). The cylinder seat (1) has a miniature cylinder cavity (2) at one end facing the mold template (10). A movable miniature high-pressure cylinder (3) is installed in the miniature cylinder cavity (2). The first axial end of the miniature high-pressure cylinder (3) is connected to one end of a cutting component inside the mold template (10). A return spring (9) that abuts against the mold template (10) is sleeved on the outside of the cutting component. An oil inlet channel (6) is provided inside the cylinder seat (1) and is connected to the internal oil passage of the mold template (10). The oil inlet channel (6) is connected to the miniature cylinder cavity (2) at the second axial end of the miniature high-pressure cylinder (3).

2. The in-mold cutting device according to claim 1, characterized in that: The cutting component includes a connecting rod (8) coaxially arranged with the miniature high-pressure cylinder (3) and a cutting blade (11) installed at one end of the connecting rod (8). The return spring (9) is sleeved on the outside of the connecting rod (8).

3. The in-mold cutting device according to claim 1, characterized in that: The rear end of the cylinder seat (1) is provided with a limiting screw (4) connected to the miniature high-pressure cylinder (3). The limiting screw (4) includes a screw rod connected to the miniature high-pressure cylinder (3) and a nut seat located at one end of the screw rod. The nut seat is embedded in the countersunk hole on the rear side of the cylinder seat (1).

4. The in-mold cutting device according to claim 3, characterized in that: The limiting screw (4) passes laterally through the oil inlet channel (6), and a sealing gasket (14) is installed between the nut seat of the limiting screw (4) and the countersunk hole on the rear side of the cylinder seat (1).

5. The in-mold cutting device according to claim 1, characterized in that: The oil inlet channel (6) includes a transverse channel (13) connected to the internal oil passage of the mold template (10) and a vertical channel (12) arranged vertically on the rear side of the inner cavity (2) of the micro cylinder. The vertical channel (12) is connected to the inner cavity (2) of the micro cylinder.

6. The in-die cutting device according to claim 5, characterized in that: The lower end of the vertical flow channel (12) extends to the lower end face of the cylinder seat (1) and is sealed by a plug screw (5).

7. The in-mold cutting device according to claim 1, characterized in that: An end face sealing ring (7) is installed between the cylinder seat (1) and the mold template (10) around the oil inlet channel (6).

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