Ox horn glue feeding structure and injection mold

Abstract

The utility model relates to an ox horn glue feeding structure which comprises a glue feeding runner, a first horn gate and a second horn gate which are communicated with the glue inlet runner are arranged at two ends of the glue inlet runner; a first glue column which is perpendicular to and communicated with the glue inlet runner is arranged at the bottom of the glue inlet runner; a first ejector pin matched with the first rubber column is arranged below the first rubber column; the first rubber column and the first ejector pin are integrally cylindrical, the bottom of the first rubber column is flush with the bottom of a mold insert matched with the ox horn rubber feeding structure, and the radius of the first rubber column is at least 0.25 mm larger than that of the first ejector pin. By optimizing the sizes of the rubber column, the ejector pin and the ox horn structure and the like, the stability of the ox horn rubber feeding structure is improved, breakage, ejection overturning and bouncing in the ejection process are prevented, the requirement for shortening the forming period can be met, plastic materials are saved, machining is easy, and grabbing is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and in particular relates to a horn glue feeding structure and an injection mold. Background Art

[0002] A glue injection structure with a bull horn shape is often used in the mold casting system. Compared with side injection and overlapping injection, the bull horn injection structure can be hidden in the non-appearance surface of the rear mold, so that no trace of the gate can be seen on the appearance surface after the product is assembled, and the product as a whole is more beautiful. However, in the process of the bull horn injection being ejected by the ejector, the existing structure is prone to various problems such as breakage, flipping, flying off, and abnormal ejection noise, resulting in the ejection runner being broken and remaining in the mold that is difficult to remove, affecting automated production and reducing production efficiency. The bull horn injection structure is flipped over or bounced off, causing damage to the mold, which requires mold repair and increases production costs.

[0003] Therefore, it is expected to set a stable parameter to meet the requirements of shortening the molding cycle, saving plastic materials, simple processing, and convenient robot grasping. Utility Model Content

[0004] Based on this, the utility model proposes a bull horn glue feeding structure and an injection mold, which can prevent the bull horn glue feeding structure from breaking, flipping over, and bouncing off, meet the needs of shortening the molding cycle, saving plastic materials, simple processing, and convenient for robot grasping.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a bull horn glue feeding structure, which includes: a glue feeding channel; a first bull horn gate and a second bull horn gate connected to the glue feeding channel are respectively provided at both ends of the glue feeding channel; a first glue column vertically connected to the glue feeding channel is provided at the bottom of the glue feeding channel; a first ejector pin cooperating with the first glue column is provided below the first glue column; the first glue column and the first ejector pin are cylindrical as a whole, the bottom of the first glue column is flush with the bottom of the mold insert cooperating with the bull horn glue feeding structure, and the radius of the first glue column is at least 0.25mm larger than the radius of the first ejector pin.

[0006] The double-sided bull horn gate structure is relatively stable. Therefore, the present application scheme limits the height of the glue column and the width of the ejector pin and the glue column of the double-sided bull horn gate. Specifically, the radius of the glue column is increased so that the radius of the first glue column is at least 0.25 mm larger than the radius of the first ejector pin, and the width of the glue column on one side is at least 0.25 mm larger than the width of the ejector pin, and the height position of the glue column is limited, thereby improving the stability of ejection and avoiding tipping and flying.

[0007] Preferably, the distance from the inlet to the center point of the outlet of the first bull horn gate is A1, and A1 is 10-15 mm; the distance from the inlet to the center point of the outlet of the second bull horn gate is A2, which is 10-15 mm.

[0008] Preferably, the front end of the first ejector pin has a tapered head to prevent rotation after the runner is ejected.

[0009] Preferably, the first horn gate is further provided with an upwardly convex bending deformation groove on the side close to the first rubber column; the second horn gate is also provided with an upwardly convex bending deformation groove on the side close to the second rubber column to further improve stability.

[0010] On the other hand, the present invention also provides a horn gate structure, including: a gate runner; one end of the gate runner is provided with a first horn gate communicated therewith; the bottom of the gate runner is provided with a first rubber column and a second rubber column vertically and communicated with the gate runner; the first rubber column and the second rubber column are arranged in parallel, and the first rubber column is close to the horn gate, a first ejector pin is arranged below the first rubber column; a second ejector pin is arranged below the second rubber column; the first rubber column, the second rubber column, the first ejector pin and the second ejector pin are integrally cylindrical, the bottom of the first rubber column is flush with the bottom of the mold insert matched with the horn gate structure, and the radius of the first rubber column is at least 0.25 mm more than the radius of the first ejector pin, and the radius of the second rubber column is at least 0.25 mm more than the radius of the second ejector pin; the height of the first rubber column is L1, the height of the second rubber column is L2, L1 < L2, and the height L2 of the second rubber column and the central arc length C of the first horn gate satisfy: L2 = C + 5 mm.

[0011] For the unilateral horn gate structure, due to the imbalance on both sides, it is more likely to be toppled and bounced off. Therefore, in the solution of this application, a second rubber column is introduced, and by further restricting the heights of the first rubber column and the second rubber column, the ejection stability is improved, and toppling and bouncing off are avoided.

[0012] Preferably, the distance from the inlet to the center point of the outlet of the first horn gate is A1, and A1 is 10 - 15 mm.

[0013] Preferably, the front ends of the first ejector pin and the second ejector pin both have tapered heads. Two ejector pins and two tapered heads can prevent the runner from rotating after ejection.

[0014] Preferably, the first horn gate is further provided with an upwardly convex bending deformation groove on the side close to the first rubber column.

[0015] Preferably, the cross-section of the gate runner is U-shaped.

[0016] On the other hand, the present invention also provides an injection mold, including: a mold core, and a receiving groove is provided on the mold core; the above-mentioned unilateral or bilateral horn gate structure is embedded in the receiving groove through insert fitting.

[0017] Compared with the prior art, the present utility model has the following beneficial effects:

[0018] The utility model improves the stability of the bull-horn glue feeding structure by optimizing the sizes of the glue column and the ejector pin, prevents the bull-horn type runner from breaking, flipping over, and bouncing off, can save plastic materials while shortening the molding cycle, is simple to process, and is also convenient to grasp. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the schematic diagrams of the ox horn glue injection structure of Example 1 of the utility model;

[0020] Figure 2 This is the second schematic diagram of the horn glue injection structure of Example 1 of the utility model;

[0021] Figure 3 This is one of the schematic diagrams of the mold structure with a horn glue feeding structure according to Example 1 of the utility model;

[0022] Figure 4 This is the second schematic diagram of the mold structure with horn glue feeding structure of Example 1 of the utility model;

[0023] Figure 5 This is one of the schematic diagrams of the ox horn glue injection structure of Example 2 of the utility model;

[0024] Figure 6 This is the second schematic diagram of the ox horn glue injection structure of Example 2 of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Bull-horn gluing is a common method of gluing in plastic injection molds. Gate ejection often causes breakage or failure to be ejected from the mold, which has always been a problem plaguing the industry. For example, patent document CN216100181U limits the distance between the first ejection runner and the second ejection runner to prevent the bull-horn runner from breaking, flipping, and bouncing, thereby avoiding mold damage and ensuring normal automated production. However, the limitation is not accurate enough. In actual applications, it is easy for the gate to directly bounce off after ejection, so it needs to be improved.

[0027] The solution of the present application optimizes the double-sided bull-horn glue injection structure and the single-sided bull-horn glue injection structure respectively, especially the single-sided bull-horn glue injection structure, which further avoids the bull-horn type runner from breaking, flipping over, and bouncing off.

[0028] Example 1

[0029] A single-sided horn glue injection structure, reference Figure 1-4, including: a glue inlet runner 1 with a U-shaped cross-section; a first horn gate 21 is provided at one end of the glue inlet runner 1 and is in communication with it; a first glue column 31 and a second glue column 32 are vertically provided at the bottom of the glue inlet runner 1 and are in communication with the glue inlet runner 1; the first glue column 31 and the second glue column 32 are arranged in parallel, and the first glue column 31 is close to the first horn gate 21. A first ejector pin 41 is provided below the first glue column 31 and is matched with it; a second ejector pin 42 is provided below the second glue column 32 and is matched with it; the first glue column 31, the second glue column 32, the first ejector pin 41, and the second ejector pin 42 are all cylindrical. The bottom of the first glue column 31 is flush with the bottom of the mold insert 8 that is matched with the horn glue inlet structure, and the radius of the first glue column 31 is 0.25 mm more than the radius of the first ejector pin; the radius of the second glue column 32 is 0.25 mm more than the radius of the second ejector pin 42; the height of the first glue column 31 is L1, the height of the second glue column is L2, and L1 < L2; and the height L2 of the second glue column and the central arc length C of the horn gate satisfy: L2 = C + 5 mm.

[0030] The distance from the inlet to the center point of the outlet of the first horn gate 21 is A1, and A1 is 10 - 15 mm. The value of A1 should be as small as possible and can be selected from 10 to 15 mm according to different products to make different specifications.

[0031] The front ends of the first ejector pin 41 and the second ejector pin 42 both have tapered heads. Two ejector pins and two tapered heads can prevent the runner from rotating after ejection.

[0032] The first horn gate 21 is also provided with an upwardly convex bending deformation groove 6 on the side close to the first glue column.

[0033] This embodiment is a single-sided horn glue inlet structure with poor stability and is more likely to be toppled and bounced off. On the basis of increasing the width of the glue column, by setting the first glue column 31 and the second glue column 32, and the first ejector pin 41 and the second ejector pin 42 that are matched with them, the ejection stability is improved. Further, by optimizing the height of the glue column and combining with the design of the tapered head, the ejection stability is improved, and toppling and bouncing off are avoided.

[0034] Figure 3 and 4 is a schematic structural diagram of a mold with this glue inlet structure, including a mold core 7. A receiving groove is provided on the mold core 7; the above-mentioned single-sided horn glue inlet structure is embedded in the receiving groove through an insert 8; 9 is a product to be injection-molded. When the product is molded, the first ejector pin 41 and the second ejector pin 42 respectively push the first glue column 31 and the second glue column 32, pull the horn out of the mold channel. After ejecting a certain distance, the glue inlet runner 1 can be grabbed by a manipulator.

[0035] The above structure is applied to actual production. After two years of operation, the injection-molded products have stable mass production and high qualification rate.

[0036] Embodiment 2

[0037] refer to Figure 5-6 , a double-sided bull horn glue feeding structure, a glue feeding channel 1 with a U-shaped cross-section; a first bull horn gate 21 and a second bull horn gate 22 connected thereto are respectively provided at both ends of the glue feeding channel 1; a first glue column 31 vertically connected to the glue feeding channel 1 and a first ejector pin (not shown) matched thereto are provided at the bottom of the glue feeding channel 1; the first glue column 31 and the first ejector pin are cylindrical as a whole. Due to the double-sided glue feeding, the balance is relatively good, so only one glue column can be set for ejection, as long as the bottom of the first glue column 31 is flush with the bottom of the mold insert matched with the bull horn glue feeding structure; and the radius of the first glue column is at least 0.25mm larger than the radius of the first ejector pin.

[0038] The distance from the inlet to the center of the outlet of the first horn gate 21 is A1, A1 is 10-15mm; the distance from the inlet to the center of the outlet of the second horn gate 22 is A2 is 10-15mm. The distance from the inlet to the center of the outlet of the horn gate should be as small as possible, and can be selected from 10 to 15mm according to different products to produce different specifications.

[0039] The front end of the first ejector pin has a tapered head to prevent the runner from rotating after being ejected.

[0040] The first bull horn gate 21 is also provided with a bending deformation groove 6 protruding upwards on the side close to the first glue column 31; the second bull horn gate 22 is also provided with a bending deformation groove 6 protruding upwards on the side close to the first glue column, further improving stability.

[0041] The double-sided bull horn gate structure is relatively stable. Therefore, in this embodiment, the height of a single glue column of the double-sided bull horn gate and the radius of the ejector pin and the glue column are restricted to improve the stability of ejection and avoid flipping and flying.

[0042] The ox horn glue injection structure shown in the above-mentioned embodiments 1 and 2 has been applied to actual production. After two years of operation, the product mass production is stable and the qualified rate is high.

[0043] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A horn glue injection structure, characterized in that: Comprising: The glue inlet runner; A first horn gate and a second horn gate which are respectively arranged at two ends of the glue inlet runner and communicated with the glue inlet runner; A first glue column which is vertically arranged at the bottom of the glue inlet runner and communicated with the glue inlet runner; A first ejector pin which is arranged below the first glue column and matched with the first glue column; The first glue column and the first ejector pin are integrally cylindrical. The bottom of the first glue column is flush with the bottom of the mold insert matched with the horn glue inlet structure, and the radius of the first glue column is at least 0.25 mm more than the radius of the first ejector pin.

2. The horn glue injection structure according to claim 1, characterized in that: The distance from the center point of the inlet to the outlet of the first horn gate is A1, and A1 is 10 - 15 mm; the distance from the center point of the inlet to the outlet of the second horn gate is A2, and A2 is 10 - 15 mm.

3. The horn glue injection structure according to claim 1, characterized in that: The front end of the first ejector pin has a tapered head.

4. The horn glue injection structure according to claim 1, characterized in that: The first horn gate is also provided with an upward convex bending deformation groove on the side close to the first glue column; the second horn gate is also provided with an upward convex bending deformation groove on the side close to the first glue column.

5. A horn glue injection structure, characterized in that: Comprising: The glue inlet runner; A first horn gate which is arranged at one end of the glue inlet runner and communicated with the glue inlet runner; A first glue column and a second glue column which are vertically arranged at the bottom of the glue inlet runner and communicated with the glue inlet runner; the first glue column and the second glue column are arranged in parallel, and the first glue column is close to the horn gate. A first ejector pin which is arranged below the first glue column and matched with the first glue column; a second ejector pin which is arranged below the second glue column and matched with the second glue column; The first glue column, the second glue column, the first ejector pin and the second ejector pin are integrally cylindrical. The bottom of the first glue column is flush with the bottom of the mold insert matched with the horn glue inlet structure, and the radius of the first glue column is at least 0.25 mm more than the radius of the first ejector pin at least, and the radius of the second glue column is at least 0.25 mm more than the radius of the second ejector pin at least; The height of the first glue column is L1, the height of the second glue column is L2, L1 < L2, and the height L2 of the second glue column and the central arc length C of the first horn gate satisfy: L2 = C + 5 mm.

6. The horn glue injection structure according to claim 5, characterized in that: The distance from the center point of the inlet to the outlet of the first horn gate is A1, and A1 is 10 - 15 mm.

7. The horn glue injection structure according to claim 5, characterized in that: The front ends of the first ejector pin and the second ejector pin both have tapered heads.

8. The horn glue injection structure according to claim 5, characterized in that: The first horn gate is also provided with an upward convex bending deformation groove on the side close to the first glue column.

9. The horn glue injection structure according to any one of claims 1 to 8, characterized in that: The cross section of the glue inlet runner is U-shaped.

10. An injection mold, characterized in that: Comprising: A mold core which is provided with a receiving groove; the horn glue inlet structure according to any one of claims 1 - 9 is embedded in the receiving groove through insert fitting.

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