Application structure of mold core middle plate
By designing a mold core plate and inlet/outlet channels in the mold, combined with the guiding action of spring pins and 0-degree bundle blocks, the problem of inlet and outlet of silicone LSR products in the mold is solved, achieving effective elevation of the injection parting surface and smooth demolding.
Patent Information
- Application Number
- CN202520553644.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-27
AI Technical Summary
The existing mold structure cannot be designed for the injection and discharge of silicone LSR products. The conventional front and rear mold structure causes the injection of hard plastic products to block the injection, making it impossible to dispense the plastic from the parting surface of the front and rear molds.
The mold core plate is designed with an added injection parting surface. The injection and ejection channels on the mold core plate allow for injection and ejection of the silicone LSR product from an oblique top. Combined with the guiding action of the spring pin and the 0-degree retainer block, the mold core plate is prevented from sticking to the front mold during demolding.
It enables efficient injection and ejection of silicone LSR products from an oblique top, solving the problem of injection and ejection in the mold structure and avoiding the problem of adhesion between the mold core plate and the front mold.
Smart Images
Figure CN223918538U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold technology, and in particular to an application structure of a mold core plate. Background Technology
[0002] Injection molded products such as Figure 1 As shown, a first-shot rigid rubber product a is pre-injected and embedded in a second-shot mold. After the second-shot silicone LSR product b is formed, they are removed together. The second-shot silicone LSR product b is located inside the first-shot rigid rubber product a, and several undercut structures are set inside the second-shot silicone LSR product b. The undercut structures are used for subsequent wire fastening. The silicone LSR product needs to be undercut on the front mold insert. It is not possible to dispense glue from the front mold insert, i.e., from above, into the cavity where the silicone LSR product is located. Conventional molding molds are mostly front and rear molds. The glue depth of the front mold is about 1mm, and the parting surface is about 1mm lower than the top of the injection molded product. If the glue is injected from the parting surface of the front and rear molds, the first-shot rigid rubber product a will block the glue injection. Conventional front and rear mold structures cannot be designed to allow the glue injection and ejection of the silicone LSR product.
[0003] Based on the above defects and shortcomings, it is necessary to improve the existing technology and design an application structure for the core plate. Utility Model Content
[0004] The main technical problem solved by this utility model is to provide an application structure for a mold core plate. The mold core plate is designed to increase the injection parting surface. The injection parting surface is raised relative to the front and rear mold parting surfaces, which can inject and eject silicone LSR products from an obliquely upward position.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A mold core plate application structure is provided, which includes a front mold, a rear mold, and a mold core plate. The front mold and the rear mold are connected by a mold spring for elastic guidance. The front mold core of the front mold and the rear mold core of the rear mold are vertically opposite each other. The rear mold core is provided with a slider that slides laterally with the opening and closing of the mold. A positioning cavity for a single injection of hard plastic product is provided on the opposite surface of a set of sliders. A positioning insert for positioning and placing a single injection of hard plastic product and an ejector pin for ejecting the molded product are vertically inserted into the rear mold core. A front mold insert pin that extends into a single injection of hard plastic product is vertically inserted into the front mold. The mold insert pin and the inner wall of the first-shot hard plastic product form a two-shot silicone LSR product molding cavity. A mold core middle plate is provided between the front mold core and the rear mold core to increase the injection parting surface. The mold core middle plate has an inlet channel and an outlet channel. The inlet channel includes an inlet port, a turning channel and an inlet channel connected in sequence. The inlet port is vertically opposite to the injection nozzle on the front mold. The turning channel is horizontally set and connected to the inlet port. The inlet channel is vertically set and connected to the turning channel. The outlet channel includes a vertically set outlet channel and an outlet port that is connected to the outlet channel and extends horizontally outward. The inlet channel and the outlet channel point to the silicone LSR product molding cavity.
[0006] Preferably, the inlet channel and outlet channel are located on both sides of the front mold insert pin of the front mold, and the front mold insert pin is also provided with a clearance groove to facilitate the inlet and outlet of the glue.
[0007] Preferably, a portion of the top surface of the mold core plate is provided with a clearance-avoiding parting surface, the height of which is lower than the top surface of the mold core plate.
[0008] Preferably, the clearance height of the clearance parting surface is 0.2 mm.
[0009] Preferably, a plurality of 0-degree bundle blocks are installed on the front mold core, and guide clearance grooves that cooperate with the 0-degree bundle blocks are opened around the middle plate of the mold core. A clearance gap is provided between the guide clearance groove and the 0-degree bundle block, with a clearance gap of 0.25mm on one side.
[0010] Preferably, the front mold core is also equipped with several spring pins that abut against the middle plate of the mold core, and the load of the spring pins is increased.
[0011] Preferably, the mold core plate is also equipped with handles on both sides for easy handling. The handles are designed in a split manner, including a front end of the handle that is fixedly connected to the mold core plate and a rear end of the handle for holding. The front end of the handle is made of bakelite for heat insulation, and the rear end of the handle is made of S50C steel for increasing strength.
[0012] Preferably, the rear mold core is vertically mounted with a positioning pin for quick insertion and positioning of the mold core middle plate.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] The design of the mold core plate is used to increase the injection parting surface. The injection parting surface is raised by 8mm relative to the front and rear mold parting surfaces, which can allow the silicone LSR product to be injected and ejected from an oblique top.
[0015] The front mold core is equipped with spring pins that abut against the mold core middle plate, and the spring pins are designed with increased load capacity; the front mold core is equipped with several 0-degree bundles that cooperate with the guide of the mold core middle plate, with a clearance of 0.25mm on one side; the top surface of the mold core middle plate is equipped with a clearance parting surface; the above measures prevent the mold core middle plate from sticking to the front mold during demolding.
[0016] The front end of the handle is made of bakelite for heat insulation, while the rear end is made of S50C steel to increase strength. These measures address the issue of handles being easily damaged. Attached Figure Description
[0017] Figure 1 This is a structural diagram of an injection-molded product.
[0018] Figure 2 This is a structural diagram of an application structure for a mold core plate.
[0019] Figure 3 This is a partial structural diagram of an application structure for a mold core plate.
[0020] Figure 4 This is a partial sectional view of the application structure of a mold core plate.
[0021] Figure 5 This is a partial unfolded structural diagram of an application structure for a mold core plate.
[0022] Figure 6 This is a schematic diagram of the inlet and outlet channels of a mold core plate.
[0023] Figure 7 This is a schematic diagram of the structure of a mold core plate, which is used in the application of a mold core plate.
[0024] Among them, 1. front mold, 11. front mold core, 12. front mold insert, 13. 0-degree retainer block, 14. spring pin, 2. rear mold, 21. rear mold core, 22. slider, 23. positioning insert, 24. ejector pin, 25. positioning insert, 3. mold core middle plate, 30. clearance parting surface, 301. guide clearance groove, 31. sprue, 311. sprue, 312. turning channel, 313. sprue channel, 32. sprue channel, 321. sprue channel, 322. sprue outlet, 4. handle, 41. handle front end, 42. handle rear end. Detailed Implementation
[0025] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0026] Please see Figures 1 to 7 The embodiments of this utility model include:
[0027] An application structure for a mold core plate includes a front mold 1, a rear mold 2, and a mold core plate 3. The front mold 1 and the rear mold 2 are elastically connected by a mold spring. The front mold core 11 of the front mold 1 and the rear mold core 21 of the rear mold 2 are vertically opposite each other. The rear mold core 21 is provided with a slider 22 that slides laterally with the mold opening and closing. A positioning cavity for a single-shot rigid rubber product is provided on the opposite face of a set of sliders 22. A positioning insert 23 for positioning and placing a single-shot rigid rubber product and an ejector pin 24 for ejecting the molded product are vertically inserted on the rear mold core 21. A front mold insert 12 that extends into the single-shot rigid rubber product is vertically inserted on the front mold 1. The front mold insert 12 and the inner wall of the single-shot rigid rubber product form a molding cavity for a two-shot silicone LSR product. The mold core plate 3 is provided between the front mold core 11 and the rear mold core 21. The mold core plate 3 has an inlet channel 31 and an outlet channel 32. The inlet channel 3... 1 includes a glue inlet 311, a turning channel 312, and a glue inlet channel 313 connected in sequence. The glue inlet 311 is vertically opposite to the glue injection nozzle on the front mold 1. The turning channel 312 is horizontally arranged and connected to the glue inlet 311. The glue inlet channel 313 is vertically arranged and connected to the turning channel 312. The glue outlet 32 includes a vertically arranged glue outlet channel 321 and a glue outlet 322 that is connected to the glue outlet channel 321 and extends horizontally outward. The glue inlet channel 313 and the glue outlet channel 321 point to the molding cavity of the silicone LSR product. The glue inlet channel 31 and the glue outlet channel 32 are located on both sides of the front mold insert 12 of the front mold 1. The front mold insert 12 is also provided with a clearance groove to facilitate glue injection and glue ejection. The design of the mold core plate 3 is used to increase the glue injection parting surface. The glue injection parting surface is raised by 8mm relative to the front and rear mold parting surfaces, which can inject and eject the silicone LSR product from an obliquely upward position.
[0028] The rear mold core 21 is vertically mounted with positioning pins 25 for quick insertion and positioning of the mold core middle plate 3, which serve as guides and positions.
[0029] A clearance parting surface 30 is provided on a portion of the top surface of the mold core plate 3. The clearance parting surface 30 is lower than the top surface of the mold core plate 3 by 0.2mm, which reduces the contact area between the mold core plate 3 and the front mold 1.
[0030] The front mold core 11 is equipped with several 0-degree retaining blocks 13. When the mold is closed, the 0-degree retaining blocks 13 are in close contact with the rear mold 2. The mold core middle plate 3 is provided with guide clearance grooves 301 around its perimeter to cooperate with the 0-degree retaining blocks 13. A clearance gap is provided between the guide clearance grooves 301 and the 0-degree retaining blocks 13, with a clearance gap of 0.25mm on one side. The front mold core 11 is also equipped with several spring pins 14 that abut against the mold core middle plate 3. The spring pins 14 are designed with increased load.
[0031] The mold core plate 3 is also equipped with handles 4 on both sides for easy handling. The handles 4 are designed in two parts, including a front handle 41 that is fixedly connected to the mold core plate 3 and a rear handle 42 for holding. The front handle 41 is made of bakelite for heat insulation, and the rear handle 42 is made of S50C steel for increasing strength. The above solves the problem of easy damage to the handle.
[0032] This utility model discloses an application structure for a mold core middle plate. The design of the mold core middle plate is used to increase the injection parting surface. The injection parting surface is raised relative to the front and rear mold parting surfaces, which can allow the silicone LSR product to be injected and ejected from an obliquely upward position.
[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. An application structure for a mold core plate, comprising a front mold and a rear mold, the front mold and the rear mold being elastically connected by a mold spring, the front mold core of the front mold and the rear mold core of the rear mold being vertically opposite each other, the rear mold core being provided with a slider that slides laterally with the opening and closing of the mold, a positioning cavity for a single injection of rigid rubber product being provided on the opposite surfaces of a set of sliders, a positioning insert for positioning and placing a single injection of rigid rubber product and an ejector pin for ejecting the molded product being vertically inserted on the rear mold core, the front mold core having a front mold insert that extends into the single injection of rigid rubber product, the front mold insert and the inner wall of the single injection of rigid rubber product forming a molding cavity for a two-injection silicone LSR product, characterized in that: It also includes a mold core plate, which is provided between the front mold core and the rear mold core to increase the injection parting surface. The mold core plate has an injection channel and an outlet channel. The injection channel includes an injection port, a turning channel and an injection channel connected in sequence. The injection port is vertically opposite to the injection nozzle on the front mold. The turning channel is horizontally set and connected to the injection port. The injection channel is vertically set and connected to the turning channel. The outlet channel includes a vertically set outlet channel and an outlet that is connected to the outlet channel and extends horizontally outward. The injection channel and the outlet channel point to the molding cavity of the silicone LSR product.
2. The application structure of the mold core plate according to claim 1, characterized in that: The inlet and outlet channels are located on both sides of the front mold insert pin of the front mold, and the front mold insert pin is also provided with clearance grooves to facilitate the inlet and outlet of the glue.
3. The application structure of the mold core plate according to claim 1, characterized in that: A parting surface is provided on a portion of the top surface of the mold core plate, and the height of the parting surface is lower than that of the top surface of the mold core plate.
4. The application structure of the mold core plate according to claim 3, characterized in that: The clearance height of the clearance parting surface is 0.2mm.
5. The application structure of the mold core plate according to claim 1, characterized in that: The front mold core is equipped with several 0-degree bundle blocks. The mold core middle plate is provided with guide clearance grooves around the perimeter that cooperate with the 0-degree bundle blocks. A clearance gap is provided between the guide clearance grooves and the 0-degree bundle blocks, with a clearance gap of 0.25mm on one side.
6. The application structure of the mold core plate according to claim 1, characterized in that: The front mold core is also equipped with several spring pins that abut against the middle plate of the mold core, and the load of the spring pins is increased.
7. The application structure of the mold core plate according to claim 1, characterized in that: The mold core plate is also equipped with handles on both sides for easy handling. The handles are designed in two parts, including a front end that is fixedly connected to the mold core plate and a rear end for holding. The front end of the handle is made of bakelite for heat insulation, and the rear end of the handle is made of S50C steel for increased strength.
8. The application structure of the mold core plate according to claim 1, characterized in that: The rear mold core is vertically equipped with positioning pins for quick insertion and positioning of the mold core middle plate.