Plastic mold horn for preventing powder loss

Abstract

This invention relates to a horn-shaped sprue for plastic molds to prevent powder shedding. It includes an A plate, a B plate, an integrated pillar, a top pin plate, a bottom pin plate, an ejector pin, a sprue insert, a horn-shaped sprue plate, and a rear mold core. The integrated pillar is located at both ends between the A plate and the B plate. The top pin plate is located on the top side of the bottom pin plate, and the bottom pin plate is located on the top side of the A plate. The rear mold core is fixedly embedded in the top surface of the B plate. The sprue insert is fixedly embedded inside the rear mold core. The horn-shaped sprue plate is located on the top surface of the sprue insert. The bottom end of the ejector pin is connected to the top pin plate and the bottom pin plate, and the top end of the ejector pin is fixed to the top side of the horn-shaped sprue plate. This invention optimizes the design of payment terminal devices, changes the traditional structural design, and introduces a horn-shaped sprue design to solve the problem of powder shedding caused by the sprue scraping against the sprue insert during ejection. This improves product yield, protects the mold during parting, and extends the mold's service life, making it suitable for widespread use.

Description

Technical Field

[0001] This invention relates to the field of plastic mold manufacturing, and more particularly to a horn-shaped gate for plastic molds that prevents powder shedding. Background Technology

[0002] In plastic mold manufacturing, the design of the horn gate is a right-angle design. However, the right-angle design can cause the gate to scrape against the gate insert when it ejects, resulting in powder shedding from the gate. This ultimately leads to increased product defects, damage to the mold parting surface, reduced mold life, and increased production costs, which is very unreasonable. In order to solve the problem of powder shedding, a horn gate for plastic molds that prevents powder shedding is designed. Summary of the Invention

[0003] The purpose of this invention is to provide a horn-shaped gate for plastic molds that prevents powder shedding, thereby solving the above-mentioned technical problems. To achieve the above objective, this invention adopts the following technical solution:

[0004] A horn-shaped sprue for preventing powder shedding in a plastic mold includes an A plate, a B plate, an integral pillar, a face pin plate, a bottom pin plate, an ejector pin, a sprue insert, a horn-shaped sprue plate, and a rear mold core. The A plate is disposed on the top side of the B plate, the integral pillar is disposed at both ends between the A plate and the B plate, the face pin plate is disposed on the top side of the bottom pin plate, the bottom pin plate is disposed on the top side of the A plate, the rear mold core is fixedly embedded in the top surface of the B plate, the sprue insert is fixedly embedded in the inner side of the rear mold core, the horn-shaped sprue plate is disposed on the top surface of the sprue insert, the bottom end of the ejector pin is connected to the face pin plate and the bottom pin plate, and the top end of the ejector pin is fixed to the top side of the horn-shaped sprue plate.

[0005] Based on the above technical solution, symmetrical horn-shaped gates are provided on both sides of the top surface of the sprue insert. The two ends of the horn-shaped gates are connected to the top surface of the sprue insert. The inner end of the horn-shaped gate is set on the bottom side of the side end of the horn-shaped gate plate, and the outer end of the horn-shaped gate is provided with a product pressure plate.

[0006] Based on the above technical solution, the inner end of the horn gate is provided with a pointed port, the outer end of the horn gate is provided with an open port, the side of the open port is provided with a chamfered arc, the outer side of the pointed port is provided with a pressure plate groove, the product pressure plate is provided in the pressure plate groove, the horn gate plate is tightly attached to the open port, and the side end of the horn gate plate is tightly attached to the chamfered arc.

[0007] Compared with the prior art, the present invention has the following advantages: The present invention optimizes the setting of payment terminal equipment, changes the traditional structural design, and designs a horn gate design to solve the problem of sprue powdering caused by scraping the sprue insert when the horn gate is ejected, thereby improving product yield, protecting the mold parting process, extending the mold service life, and making it suitable for widespread use. Attached Figure Description

[0008] Figure 1 This is a diagram showing the overall appearance of the present invention.

[0009] Figure 2 This is a schematic diagram of the side plate of the present invention.

[0010] Figure 3 This is a partial planar schematic diagram of the present invention.

[0011] Figure 4 This is a schematic diagram showing the side profile of the sprue insert of the present invention.

[0012] In the diagram: 1. Plate A, 2. Plate B, 3. Integrated column, 4. Face pin plate, 5. Bottom pin plate, 6. Ejector pin, 7. Sprue insert, 8. Horn sprue plate, 9. Rear mold core, 10. Horn sprue, 11. Product pressure plate, 12. Pointed end, 13. Opening end, 14. Chamfered arc, 15. Pressure plate groove. Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] A horn-shaped sprue for preventing powder shedding in a plastic mold includes an A plate 1, a B plate 2, an integral pillar 3, a face pin plate 4, a bottom pin plate 5, an ejector pin 6, a sprue insert 7, a horn-shaped sprue plate 8, and a rear mold core 9. The A plate 1 is disposed on the top side of the B plate 2. The integral pillar 3 is disposed at both ends between the A plate 1 and the B plate 2. The face pin plate 4 is disposed on the top side of the bottom pin plate 5. The bottom pin plate 5 is disposed on the top side of the A plate 1. The rear mold core 9 is fixedly embedded in the top surface of the B plate 2. The sprue insert 7 is fixedly embedded in the inner side of the rear mold core 9. The horn-shaped sprue plate 8 is disposed on the top surface of the sprue insert 7. The bottom end of the ejector pin 6 is connected to the face pin plate 4 and the bottom pin plate 5, and the top end of the ejector pin 6 is fixed to the top side of the horn-shaped sprue plate 8.

[0015] The top surface of the sprue insert 7 has symmetrical horn-shaped sprues 10 on both sides. The two ends of the horn-shaped sprues 10 are connected to the top surface of the sprue insert 7. The inner end of the horn-shaped sprues 10 is located on the bottom side of the horn-shaped sprue plate 8. The outer end of the horn-shaped sprues 10 is provided with a product pressure plate 11.

[0016] The inner end of the horn-shaped gate 10 is provided with a pointed port 12, and the outer end of the horn-shaped gate 10 is provided with an open port 13. The side of the open port 13 is provided with a chamfered arc 14. The outer side of the pointed port 12 is provided with a pressure plate groove 15. The product pressure plate 11 is provided in the pressure plate groove 15. The horn-shaped gate plate 8 is tightly attached to the open port 13, and the side end of the horn-shaped gate plate 8 is tightly attached to the chamfered arc 14.

[0017] Working principle of the invention: The main feature of this structure is that the opening 13 of the horn gate 10 is provided with a chamfered arc 14, which ensures the minimum contact area at the side end of the horn gate plate 8 and its contact point. This allows the chamfered arc 14 to protect the mold from powdering when it is forced to detach from the gate insert 7 and passes through the opening, thus successfully completing the mold production.

[0018] The above description represents a preferred embodiment of the present invention. For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of the present invention, based on the teachings of the present invention, still fall within the protection scope of the present invention.

Claims

1. A horn-shaped gate for preventing powder shedding in plastic molds, characterized in that, The mold includes an A plate (1), a B plate (2), an integral pillar (3), a face pin plate (4), a bottom pin plate (5), an ejector pin (6), a sprue insert (7), a horn-shaped sprue plate (8), and a rear mold core (9). The A plate (1) is located on the top side of the B plate (2). The integral pillar (3) is located at both ends between the A plate (1) and the B plate (2). The face pin plate (4) is located on the top side of the bottom pin plate (5). The bottom pin plate (5) is located on the top side of the A plate (1). The rear mold core (9) is fixedly embedded on the top surface of the B plate (2). The sprue insert (7) is fixedly embedded on the inner side of the rear mold core (9). The horn-shaped sprue plate (8) is located on the top surface of the sprue insert (7). The bottom end of the ejector pin (6) is connected to the face pin plate (4) and the bottom pin plate (5). The top end of the ejector pin (6) is fixed to the top side of the horn-shaped sprue plate (8). The top surface of the sprue insert (7) is provided with symmetrical horn gates (10) on both sides. The two ends of the horn gates (10) are connected to the top surface of the sprue insert (7). The inner end of the horn gates (10) is set on the bottom side of the side end of the horn gate plate (8). The outer end of the horn gates (10) is provided with a product pressure plate (11). The inner end of the horn gates (10) is provided with a pointed port (12). The outer end of the horn gates (10) is provided with an open port (13). The side of the open port (13) is provided with a chamfered arc (14). The outer side of the pointed port (12) is provided with a pressure plate groove (15). The product pressure plate (11) is set in the pressure plate groove (15). The horn gate plate (8) is tightly attached to the open port (13), and the side end of the horn gate plate (8) is tightly attached to the chamfered arc (14).

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