Novel mold structure for feeding glue into sliding block and automatically cutting pouring gate
By using a cylinder to drive the sealing pin fixing plate and the sealing pin in tandem, the self-cutting function of the inner gate of the slider is realized, which solves the problem of large gate residue in traditional molds and improves production efficiency and product appearance consistency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional injection molds have difficulty automatically cutting off the gate at the slide block, resulting in large gate residues that affect product appearance consistency and production efficiency.
The gate is self-cut by using a cylinder to drive the sealing pin fixing plate and the sealing pin to work together. The sealing pin slides in the gate to cut off the gate and ensures precise removal of gate residue.
It achieves automatic gate cutting, avoiding product appearance inconsistencies caused by gate residue, improving production efficiency and reducing costs.
Smart Images
Figure CN224044454U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of injection molds, in particular to a novel mold structure with self-cutting gates for internal glue injection of a sliding block. BACKGROUND
[0002] A conventional injection mold mainly comprises a fixed mold and a movable mold, and an injection cavity is formed when the mold is closed for molding a product. Molten plastic enters the cavity through a gate, and the product is obtained after cooling and solidification.
[0003] However, for the case of a sliding block gate, it is often difficult to automatically cut off the gate, and the gate residue is large. When the gate is arranged in the sliding block, it is difficult to automatically cut off the gate. In the injection molding of some complex-shaped plastic products, in order to meet the appearance and structure requirements of the product, the gate needs to be arranged in the sliding block part. In the past, the flow channel at the gate was connected to the product after the injection molding was completed, and the gate could not be automatically cut off during the mold opening and closing process. Only after the product was demolded, the gate could be manually cut off by using a tool, which was low in efficiency, and the force and position of manual operation could not be guaranteed to be completely consistent, resulting in uneven gate cutting surfaces.
[0004] Taking the case of two-color mold two-shot soft glue injection from the sliding block side as an example, the gate part will have a large amount of plastic residue after traditional mold injection, forming a large gate residue. For example, when producing a plastic product with a soft rubber part, the soft glue is injected from the sliding block side. After injection molding, there will be obvious protrusions or excess glue at the gate. Even if subsequent secondary processing and trimming are performed, due to differences in trimming degree and effect for different products, the appearance of the same batch of products will be inconsistent, affecting the overall quality and aesthetics of the product.
[0005] Therefore, it is necessary to provide a novel mold structure with self-cutting gates for internal glue injection of a sliding block to solve the above problems.
[0006] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background technology of the concept of the present application, and therefore, it can contain information that does not constitute prior art. CONTENT OF THE UTILITY MODEL
[0007] The utility model aims at providing a novel mold structure with self-cutting gates for internal glue injection of a sliding block to solve the problems raised in the background technology.
[0008] The technical scheme adopted by the application to solve its technical problems is:
[0009] The utility model provides a new mould structure of self -cutting sprue in slider, including mould, the mould includes back mould, front mould and top die, the inside of back mould and front mould is constituted for the injection cavity of shaping after the mould of front mould, top die sets up on the top surface of front mould and back mould, the side wall of front mould is fixedly installed with first slider, the side wall of first slider is fixedly installed with second slider, the side wall of second slider is fixedly installed with pneumatic cylinder,
[0010] The inside of second slider is slidably connected with needle sealing fixed plate, one side center of needle sealing fixed plate is fixedly installed with telescopic shaft of pneumatic cylinder, the other side both ends of needle sealing fixed plate are fixedly installed with needle for cutting sprue, the inside of first slider is slidably connected with needle, the inside of front mould is provided with sprue, the top surface of top die is provided with feeding opening, feeding opening is communicated with injection cavity through sprue, the end of needle is slidably connected in the inside of front mould, and the top end of needle is slidably connected in sprue.
[0011] Preferably, the inside of the second slider is provided with a sliding groove, and the needle sealing fixed plate is slidably connected in the sliding groove under the drive of the pneumatic cylinder.
[0012] Preferably, the side walls of the needle sealing fixed plate are provided with mounting grooves at both ends, respectively, and one end of the needle is fixedly installed in the mounting grooves of the needle sealing fixed plate, respectively.
[0013] Preferably, the inside of the first slider is provided with first sliding holes at both sides, respectively, and the side walls of the needle are slidably connected in the first sliding holes, respectively.
[0014] Preferably, the side walls of the front mould are provided with second sliding holes at both sides, respectively, and the end of the needle is slidably connected in the second sliding holes, and the second sliding holes are communicated with the sprue.
[0015] Preferably, the needle includes a rod body and a sprue cutting insert, the end of the rod body is integrally formed with the sprue cutting insert, the rod body is slidably connected in the first sliding hole and the second sliding hole, respectively, and the sprue cutting insert is slidably connected in the sprue.
[0016] The utility model has the advantages of:
[0017] The utility model discloses a new mould structure of self -cutting sprue in slider, including mould, the mould includes back mould, front mould and top die, the inside of back mould and front mould is constituted for the injection cavity of shaping after the mould of front mould, top die sets up on the top surface of front mould and back mould, the side wall of front mould is fixedly installed with first slider, the side wall of first slider is fixedly installed with second slider, the side wall of second slider is fixedly installed with pneumatic cylinder,
[0018] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0019] The drawings accompanying the specification of the present application serve to provide further understanding of the present application, the illustrative embodiments thereof, and its description, and do not constitute an improper limitation of the present application.
[0020] In the drawings:
[0021] Fig. 1 It is a top view of the novel mold structure of the self-cutting gate of the sliding block inner glue feeding of the utility model;
[0022] Fig. 2 It is a side view of the novel mold structure of the self-cuting gate of the sliding block inner glue feeding of the utility model.
[0023] In the drawings, various reference signs:
[0024] 1, needle seal; 2, air cylinder; 3, first sliding block; 31, first sliding hole; 41, mounting groove; 4, needle seal fixing plate; 5, glue inlet; 6, gate; 7, injection cavity; 8, back mold; 9, front mold; 91, second sliding hole; 10, ejector; 11, second sliding block; 111, sliding groove. DETAILED DESCRIPTION
[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.
[0026] In order to enable the persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the persons skilled in the art without creative labor should belong to the scope of protection of the present application.
[0027] Please refer to Figs. 1-2 The embodiments provided by the utility model have the advantages that:
[0028] The utility model provides a new mould structure of self-cutting sprue of glue inside slider, including mould, mould includes back mould 8, front mould 9 and top die 10, and the inside of back mould 8 and front mould 9 forms the injection cavity 7 for shaping after clamping, and the required product is injected and taken out through the clamping and opening of front mould 9 and back mould 8, and top die 10 is arranged on the top surface of front mould 9 and back mould 8, the sidewall of front mould 9 is fixedly installed with first slider 3, the sidewall of first slider 3 is fixedly installed with second slider 11, and the sidewall of second slider 11 is fixedly installed with pneumatic cylinder 2,
[0029] The whole opening and closing mould process: the movement of front mould 9, first slider 3, second slider 11 and pneumatic cylinder 2 makes front mould 9 can open and close with back mould 8, and after the clamping of back mould 8 and front mould 9, the space between them forms a closed injection cavity 7, when injection, the molten plastic is injected into the cavity through the glue inlet 5 of top die 10, and after cooling, the required product shape is formed, when opening, front mould 9 and back mould 8 are separated, which is convenient for taking out the shaped product.
[0030] The inside of second slider 11 is slidably connected with needle sealing fixed plate 4, one side center of needle sealing fixed plate 4 is fixedly installed with the telescopic shaft of pneumatic cylinder 2, the inside of second slider 11 is provided with sliding groove 111, needle sealing fixed plate 4 is slidably connected in sliding groove 111 under the drive of pneumatic cylinder 2, the function of sliding groove 111 is to limit the movement direction of needle sealing fixed plate 4, so that it can only slide along a specific path, so that needle sealing fixed plate 4 can move in second slider 11, to provide power for the subsequent movement of needle 1, to ensure that needle 1 can accurately complete the task of cutting off sprue 6.
[0031] The other side of needle sealing fixed plate 4 is fixedly installed with needle 1 for cutting off sprue 6 respectively at both ends, the sidewall of needle sealing fixed plate 4 is provided with mounting groove 41 respectively at both ends, one end of needle 1 is fixedly installed in mounting groove 41 of needle sealing fixed plate 4 respectively, needle 1 is slidably connected in the inside of first slider 3, and first sliding hole 31 is respectively formed in the inside of first slider 3 at both sides, and the sidewall of needle 1 is slidably connected in first sliding hole 31.
[0032] When needle sealing fixed plate 4 slides under the drive of pneumatic cylinder 2, needle 1 also moves, and first sliding hole 31 on first slider 3 provides a sliding channel for needle 1, to ensure that needle 1 can move along the predetermined trajectory, to ensure that needle 1 can stably move with needle sealing fixed plate 4, and keep accurate position and direction during the movement process, to provide accurate guiding effect for cutting off sprue 6.
[0033] The inside of the front mold 9 is provided with a gate 6, and the top surface of the top mold 10 is provided with a glue inlet 5, the glue inlet 5 is communicated with the injection cavity 7 through the gate 6, and the end of the sealing needle 1 is slidingly connected in the inside of the front mold 9, and the top end of the sealing needle 1 is slidingly connected in the gate 6.
[0034] Specifically, the side walls of the front mold 9 are respectively provided with second sliding holes 91, the end of the sealing needle 1 is slidingly connected in the second sliding hole 91, the second sliding hole 91 is communicated with the gate 6, the sealing needle 1 comprises a rod body and a gate cutting needle, the end of the rod body is integrally formed with the gate cutting needle, the rod body is slidingly connected in the first sliding hole 31 and the second sliding hole 91, and the gate cutting needle is slidingly connected in the gate 6.
[0035] During injection molding, the molten plastic enters from the glue inlet 5 of the top mold 10, flows into the injection cavity 7 through the gate 6 of the front mold 9, and when the injection pressure holding is completed, the cylinder 2 drives the sealing needle fixing plate 4 to make the gate cutting needle of the sealing needle 1 slide in the gate 6, cut off the plastic at the gate 6, and when the mold is closed for the next injection molding, the cylinder 2 drives the sealing needle 1 to retreat, opens the gate 6, and makes the plastic flow into the injection cavity 7 again, the communication between the glue inlet 5 and the gate 6 provides a plastic flow channel for the injection molding process, and the gate cutting needle of the sealing needle 1 can cut off the gate 6 at the right time to avoid the influence of the residual gate 6 on the appearance of the product, realize the self-cutting gate function of the sliding block inside glue feeding, and reduce the secondary processing procedure of the product.
[0036] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A novel mould structure of in-block sprue automatic cutting gate comprising a mould, characterised in that: The mold comprises a back mold (8), a front mold (9) and a top mold (10), the back mold (8) and the front mold (9) constitute an injection cavity (7) for molding after closing, the top mold (10) is arranged on the top surface of the front mold (9) and the back mold (8), the side wall of the front mold (9) is fixedly provided with a first sliding block (3), the side wall of the first sliding block (3) is fixedly provided with a second sliding block (11), and the side wall of the second sliding block (11) is fixedly provided with a cylinder (2). The inside of the second sliding block (11) is slidably connected with a needle sealing fixed plate (4), one side of the needle sealing fixed plate (4) is fixedly connected with the telescopic shaft of the cylinder (2), the other side of the needle sealing fixed plate (4) is fixedly provided with a needle (1) for cutting off a gate (6), the needle (1) is slidably connected in the first sliding block (3), the inside of the front mold (9) is provided with the gate (6), the top surface of the top mold (10) is provided with a glue inlet (5), the glue inlet (5) is communicated with the injection cavity (7) through the gate (6), and the end of the needle (1) is slidably connected in the front mold (9), and the top end of the needle (1) is slidably connected in the gate (6).
2. A novel mould structure of in-gate self-cut gate with sliding block as claimed in claim 1, wherein: The inside of the second sliding block (11) is provided with a sliding groove (111), and the needle sealing fixed plate (4) is slidably connected in the sliding groove (111) under the driving of the cylinder (2).
3. A novel mould structure of in-gate self-cut gate with sliding block as claimed in claim 2, wherein: The side wall of the needle sealing fixed plate (4) is provided with a mounting groove (41) at both ends, and one end of the needle (1) is fixedly arranged in the mounting groove (41) of the needle sealing fixed plate (4).
4. A novel mould structure of in-gate self-cut gate with sliding block as claimed in claim 3, wherein: The inside of the first sliding block (3) is provided with a first sliding hole (31) at both sides, and the side wall of the needle (1) is slidably connected in the first sliding hole (31).
5. A novel mould structure of in-gate self-cut gate with sliding block as claimed in claim 4, wherein: The side wall of the front mold (9) is provided with a second sliding hole (91) at both sides, the end of the needle (1) is slidably connected in the second sliding hole (91), and the second sliding hole (91) is communicated with the gate (6).
6. A novel mould structure of in-gate self-cut gate with sliding block as claimed in claim 5, wherein: The needle (1) comprises a rod body and a gate cutting (6) needle, the end of the rod body is integrally formed with the gate cutting (6) needle, the rod body is slidably connected in the first sliding hole (31) and the second sliding hole (91), and the gate cutting (6) needle is slidably connected in the gate (6).