Active glue sealing mechanism for glue melting of injection table

Abstract

The utility model relates to the field of injection molding machines, and discloses an active glue sealing mechanism for injection table glue melting, which comprises a connector arranged between a glue melting cylinder and a glue injection cylinder, the connector is internally provided with a glue passing cavity and a sealing needle capable of moving back and forth in the glue passing cavity, the two ends of the glue passing cavity are respectively provided with a glue outlet and a glue inlet, and the glue passing cavity is provided with a glue outlet and a glue outlet. And a driving assembly for driving the sealing needle to move back and forth is arranged above the sealing needle. According to the utility model, a part for actively preventing glue liquid from flowing back is designed, firstly, the connector with the sealing needle is combined between the glue melting barrel and the glue injection barrel, and during glue melting, the sealing needle is pushed by the air cylinder to move backwards, so that the glue outlet and the glue inlet are in a communicated state, and molten plastic is discharged through the glue outlet to finish subsequent glue melting operation; when glue injection is needed, the sealing needle moves forwards to seal the glue outlet, and active glue sealing operation is realized before glue injection, so that the metering precision of injection is ensured, and the injection molding production precision and stability are higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding machines, in particular to an active glue sealing mechanism for injection molding sol. Background Art

[0002] The traditional pre-solution type injection device is divided into two parts: a pre-solution cylinder and an injection cylinder, and a sol anti-return (sealing) component is arranged between the pre-solution cylinder and the injection cylinder to prevent the colloid from flowing back during injection and affecting the overall injection molding accuracy.

[0003] At present, the anti-return (sealing glue) component mainly uses anti-return steel balls to prevent backflow. For example, the patent with the announcement number CN212242006U discloses a pre-dissolved glue injection device, including a pre-dissolved glue cylinder, a connector, and a glue injection cylinder arranged in sequence. The utility model effectively reduces the maintenance and repair costs of the glue injection device, and the steel balls and the cross glue block occupy a small space, the structure is independent and simple, which is conducive to mass production, and is also conducive to maintenance and replacement, making the maintenance efficiency higher.

[0004] The applicant found that the above anti-return method mainly utilizes the colloid backflow to drive the steel balls upward to block the sol channel. However, during the blocking process, part of the colloid moves upward under pressure faster than the steel balls, causing part of the colloid to flow back into the sol channel first, resulting in poor overall injection molding production accuracy and stability.

[0005] In view of this, an active sealing mechanism for shooting platform sol is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide an active glue sealing mechanism for a sol-gel injection molding machine in order to solve the above-mentioned problems.

[0007] The technical solution adopted by the utility model is as follows: an active glue sealing mechanism for a sol on a shooting platform, comprising a connector installed between a sol cylinder and a shooting cylinder, wherein the connector has a glue passing cavity and a sealing needle that can move back and forth in the glue passing cavity, wherein the two ends of the glue passing cavity respectively have a glue outlet and a glue inlet, wherein a driving component for driving the sealing needle to move back and forth is arranged above the sealing needle, and when the sealing needle moves forward to close the glue outlet, the glue material can be prevented from flowing back during the injection.

[0008] In a preferred embodiment, a glue outlet passage communicating with an inlet hole of a glue injection cylinder is provided in front of the glue outlet, and the shape of the glue outlet is adapted to the side shape of the sealing needle.

[0009] In a preferred embodiment, the glue inlet is in the shape of a trumpet that is narrow in the front and wide in the back, and one end of the glue inlet is connected to the outlet hole of the sol cylinder.

[0010] In a preferred embodiment, the connector is provided with a plurality of threaded holes for fixing.

[0011] In a preferred embodiment, the driving assembly includes a cylinder and a mounting seat installed above the connector, the cylinder is installed on the side wall of the mounting seat, and the telescopic end of the cylinder is connected to a guide block.

[0012] In a preferred embodiment, the upper end of the sealing needle is mounted on the bottom of the guide block, and a guide groove is provided in the mounting seat to meet the sliding movement of the guide block.

[0013] In summary, due to the adoption of the above technical scheme, the beneficial effects of the utility model are: a part actively used to prevent the backflow of the glue liquid is designed. When melting the glue, the sealing needle is pushed backward by the cylinder, so that the glue outlet and the glue inlet are in a connected state, and normal melting operation can be achieved. When injection is required, the sealing needle moves forward to close the glue outlet, and the active sealing operation is achieved before injection, thereby ensuring the metering accuracy of the injection, making the injection molding production accuracy and stability higher, and it is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the internal three-dimensional structure of the utility model.

[0015] Markings in the figure: 1-cylinder, 2-mounting seat, 3-connector, 301-glue outlet, 302-glue outlet channel, 303-glue inlet, 4-guide block, 5-sealing needle. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0017] Reference Figure 1, an active glue sealing mechanism for a sol shot, comprising a connector 3 installed between a sol cylinder and a shot cylinder, wherein the connector 3 has a glue passing cavity and a sealing needle 5 which can move forward and backward in the glue passing cavity, wherein the two ends of the glue passing cavity respectively have a glue outlet 301 and a glue inlet 303, and a driving component for driving the sealing needle 5 to move forward and backward is arranged above the sealing needle 5, when the sealing needle 5 moves forward to seal the glue outlet 301, the glue material can be prevented from flowing back during glue injection, and an active part for preventing glue liquid from flowing back is designed, when the glue is melted, the sealing needle 5 is pushed backward by the driving component, so that the glue outlet 301 and the glue inlet 303 are in a connected state, and normal glue melting operation can be realized, when glue injection is required, the sealing needle 5 moves forward to seal the glue outlet 301, and the active glue sealing operation is realized before glue injection, thereby ensuring the metering accuracy of the injection, making the injection molding production accuracy and stability higher, and worthy of promotion.

[0018] It should be mentioned that the sol cylinder and the shot cylinder (not shown) are the main parts of the existing injection molding machine, and the specific structure will not be described in detail.

[0019] Furthermore, a glue outlet channel 302 connected to the inlet hole of the glue injection cylinder is provided in front of the glue outlet 301. The shape of the glue outlet 301 is adapted to the side shape of the sealing needle 5, so that the sealing needle 5 can achieve the sealing operation of the glue outlet 301 when it is against the glue outlet 301. The glue inlet 303 is generally in the shape of a trumpet that is narrow in front and wide in the back, and one end of the glue inlet 303 is connected to the outlet hole of the sol cylinder.

[0020] Furthermore, the connector 3 is provided with a plurality of threaded holes for fixing, and the threaded holes can be combined with the shooting platform mechanism, and because it is a detachable combination, the whole can be conveniently disassembled for maintenance or replacement.

[0021] Furthermore, the driving assembly includes a cylinder 1 and a mounting base 2 installed above the connector 3. The cylinder 1 is installed on the side wall of the mounting base 2. The telescopic end of the cylinder 1 is connected to a guide block 4. The cylinder 1 provides a power source for the forward and backward movement of the sealing needle 5. The cylinder 1 is electrically connected to the overall electronic control part of the injection molding machine (not shown in the figure). When the glue is melted and before injection, the electronic control part is used to control the cylinder 1 to realize active sealing operation.

[0022] It should be mentioned that the above electrical connection method is an existing commonly used electrical control technology, and the specific circuits and structures will not be described one by one.

[0023] Furthermore, the upper end of the sealing needle 5 is installed at the bottom of the guide block 4, and a guide groove is opened in the mounting seat 2 to meet the sliding movement of the guide block 4. The guide groove can play an auxiliary guiding role for the forward and backward movement of the guide block 4 and the sealing needle 5, thereby ensuring the accuracy of the forward and backward movement of the sealing needle 5.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An active sealing mechanism for a sol shot sol, comprising a connector installed between a sol shot sol cylinder and a shot shot sol cylinder, characterized in that: The connector is provided with a glue passing cavity and a sealing needle which can move forward and backward in the glue passing cavity. The two ends of the glue passing cavity are respectively provided with a glue outlet and a glue inlet. A driving component for driving the sealing needle to move forward and backward is provided above the sealing needle. When the sealing needle moves forward to close the glue outlet, the glue can be prevented from flowing back during injection.

2. The active sealing mechanism for the injection molding sol according to claim 1, characterized in that: A glue outlet passage communicating with the inlet hole of the glue injection cylinder is arranged in front of the glue outlet, and the shape of the glue outlet is matched with the side shape of the sealing needle.

3. The active glue sealing mechanism for the injection molding sol as claimed in claim 1, characterized in that: The glue inlet is in the shape of a trumpet with a narrow front and a wide rear. One end of the glue inlet is connected to the outlet hole of the sol cylinder.

4. The active sealing mechanism for the injection molding sol as claimed in claim 1, characterized in that: The connector is provided with a plurality of threaded holes for fixing.

5. The active sealing mechanism for the injection molding sol as claimed in claim 1, characterized in that: The driving assembly comprises a cylinder and a mounting seat installed above the connector, the cylinder is installed on the side wall of the mounting seat, and the telescopic end of the cylinder is connected to a guide block.

6. The active glue sealing mechanism for the injection molding sol as claimed in claim 5, characterized in that: The upper end of the sealing needle is mounted on the bottom of the guide block, and a guide groove is provided in the mounting seat to meet the sliding movement of the guide block.

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