Double-color mold exhaust structure

Abstract

The utility model discloses an exhaust structure of a double-color mold, and relates to the field of double-color injection molding, a first injection fixed mold core is provided with a first injection cavity for molding a first injection molding part, and a second injection fixed mold core is provided with a first injection accommodating groove for placing the first injection molding part, a second injection cavity for molding a second injection molding part, a first exhaust groove and a second exhaust groove; the first exhaust groove is formed in one side of the first injection containing groove, the second exhaust groove comprises a straight section and a bent section, the second injection cavity is projected on the movable mold core in the mold closing direction to form a first projection, a protruding structure is arranged on the inner wall of the first injection cavity, and the protruding structure is projected on the movable mold core in the mold closing direction to form a second projection. The bending section is projected on the movable mold core in the mold closing direction to form a third projection, and the first projection, the second projection and the third projection are sequentially connected. A second-injection exhaust groove position is designed and reserved on a first-injection product, and during second-injection molding, a gap reserved by the first-injection product is used for exhausting gas in a cavity, so that second-injection soft rubber is smoothly filled, and an ideal product effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of two-color injection molding, in particular to an exhaust structure of a two-color mold. Background Technique

[0002] A two-color mold is a mold in which two plastic materials are injection molded on the same injection molding machine, molded in two times, but the product is demolded only once. Generally, this molding process is also called two-shot injection molding, usually completed by a set of molds and requires a special two-color injection molding machine. The two-color mold has a first-shot mold core and a second-shot mold core.

[0003] Due to the good fluidity of the injection-molded soft rubber, pre-press sealing rubber is required for the second-shot mold core part. When the original second-shot mold core is opened for exhaust, imprints will be pressed out, affecting the appearance of the product; for the original exhaust method of the second-shot mold core, the verification efficiency is slow, and the risk and cost of error remedy are high. Content of the Utility Model

[0004] The purpose of the utility model is to provide an exhaust structure of a two-color mold to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: an exhaust structure of a two-color mold, including a fixed mold, a turntable, and a moving mold. The fixed mold includes a first-shot fixed mold core and a second-shot fixed mold core. The moving mold is arranged on the turntable. The moving mold includes a plurality of moving mold cores. The moving mold cores are arranged below the first-shot fixed mold core and the second-shot fixed mold core. The moving mold core is provided with a moving mold cavity and a moving mold exhaust groove. The first-shot fixed mold core is provided with a first-shot cavity for forming a first-shot injection molded part. The second-shot fixed mold core is provided with a first-shot receiving groove for placing the first-shot injection molded part, a second-shot cavity for forming a second-shot injection molded part, a first exhaust groove, and a second exhaust groove. The second-shot cavity is arranged at the center position of the first-shot receiving groove. The first exhaust groove is arranged on one side of the first-shot receiving groove. The second exhaust groove includes a straight section and a bent section. The bent section is arranged on the inner wall of the first-shot receiving groove. The first exhaust groove, the straight section, and the bent section are connected in sequence. The second-shot cavity projects onto the moving mold core along the mold closing direction to form a first projection. The inner wall of the first-shot cavity is provided with a convex structure. The convex structure projects onto the moving mold core along the mold closing direction to form a second projection. The bent section projects onto the moving mold core along the mold closing direction to form a third projection. The first projection, the second projection, and the third projection are connected in sequence.

[0006] Preferably, the first exhaust groove includes a first groove and a second groove. The second groove surrounds one end of the first-shot receiving groove. Two ends of the first groove are respectively connected to the edge position of the second-shot fixed mold core and the center position of the second groove. The second groove is bent in a U shape.

[0007] Preferably, a first-shot core is arranged at the center position of the first-shot cavity. Two ends of the convex structure respectively abut against the inner wall of the first-shot cavity and the first-shot cavity.

[0008] Preferably, the convex structure is arranged at one end of a first injection cavity.

[0009] Preferably, the convex structure is a strip-shaped structure with a rectangular cross-section.

[0010] Preferably, both ends of the convex structure gradually narrow along the extending direction.

[0011] Preferably, the convex structure is bent into an L shape, the first projection and the third projection are connected to the bent position of the second projection, and the first projection and the second projection are connected in one-to-one correspondence.

[0012] Preferably, the convex structure is bent into a U shape, the first projection and the third projection are connected to the bent position of the second projection, and a plurality of the first projections are all connected to the same second projection.

[0013] Preferably, a plurality of grooves are evenly spaced on the first injection core.

[0014] Preferably, a third exhaust groove is formed in the first injection fixed mold core, and both ends of the third exhaust groove are respectively connected to the edge position of the first injection fixed mold core and the first injection cavity.

[0015] The beneficial effects of the present utility model are as follows: An exhaust groove position for the second injection is designed and reserved on the first injection product. During the second injection molding, the gas in the cavity is exhausted by using the reserved gap of the first injection product, so that the second injection soft glue can be smoothly filled, thereby obtaining an ideal product effect. It can improve the product verification efficiency, reduce the number of mold trials, and the risk and cost of error remedy are low, and verification can be processed on the machine. Description of the Drawings

[0016] The drawings further illustrate the present utility model, but the embodiments in the drawings do not constitute any limitation to the present utility model.

[0017] Figure 1 It is a schematic structural diagram of a two-color mold provided by an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 a partial enlarged view of the H part in

[0019] Figure 3 It is a schematic structural diagram of a second injection fixed mold core provided by an embodiment of the present utility model;

[0020] Figure 4 is Figure 3 a partial enlarged view of the J part in

[0021] Figure 5 is Figure 3 a partial enlarged view of the K part in

[0022] Figure 6 Structural schematic diagram of a first-shot fixed mold core provided by an embodiment of the present utility model;

[0023] Figure 7 is Figure 6 partial enlarged view of part A in

[0024] Figure 8 Structural schematic diagram of a moving mold core provided by an embodiment of the present utility model.

[0025] Reference numerals: 1: first-shot fixed mold core; 2: second-shot fixed mold core; 3: moving mold core; 4: first exhaust groove; 5: straight section; 6: bent section; 8: first-shot injection molded part; 9: second-shot injection molded part. Detailed implementation manners

[0026] The following details the specific implementation manners of the present utility model with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for explaining and illustrating the present utility model, and are not used to limit the present utility model.

[0027] It should be noted that in the present utility model, unless otherwise stated, when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. "Inside and outside" refer to the inside and outside of the specific contour.

[0028] Such as Figures 1 - 8As shown in the figure, an exhaust structure for a two-color mold provided by an embodiment of the present utility model includes a fixed mold, a turntable, and a movable mold. The fixed mold includes a first-shot fixed mold core 1 and a second-shot fixed mold core 2. The movable mold is arranged on the turntable. The movable mold includes a plurality of movable mold cores 3. The movable mold cores 3 are arranged below the first-shot fixed mold core 1 and the second-shot fixed mold core 2. The movable mold cores 3 are provided with movable mold cavities and movable mold exhaust grooves. The first-shot fixed mold core 1 is provided with a first-shot cavity for forming a first-shot injection molded part 8. The second-shot fixed mold core 2 is provided with a first-shot receiving groove for placing the first-shot injection molded part 8, a second-shot cavity for forming a second-shot injection molded part 9, a first exhaust groove 4, and a second exhaust groove. The second-shot cavity is arranged at the central position of the first-shot receiving groove. The first exhaust groove 4 is arranged on one side of the first-shot receiving groove. The second exhaust groove includes a straight section 5 and a bent section 6. The bent section 6 is arranged on the inner wall of the first-shot receiving groove. The first exhaust groove 4, the straight section 5, and the bent section 6 are connected in sequence. The second-shot cavity projects onto the movable mold core 3 along the mold closing direction to form a first projection. The inner wall of the first-shot cavity is provided with a convex structure. The convex structure projects onto the movable mold core 3 along the mold closing direction to form a second projection. The bent section 6 projects onto the movable mold core 3 along the mold closing direction to form a third projection. The first projection, the second projection, and the third projection are connected in sequence.

[0029] The first exhaust groove 4 includes a first groove and a second groove. The second groove is arranged around one end of the first-shot receiving groove. Two ends of the first groove are respectively connected to the edge position of the second-shot fixed mold core 2 and the central position of the second groove. The second groove is bent into a U shape.

[0030] A first-shot core is arranged at the central position of the first-shot cavity. Two ends of the convex structure respectively abut against the inner wall of the first-shot cavity and the first-shot cavity.

[0031] The convex structure is arranged at one end of the first-shot cavity.

[0032] The convex structure is a long strip structure with a rectangular cross section.

[0033] Two ends of the convex structure gradually narrow along the extending direction.

[0034] The convex structure is bent into an L shape. The first projection and the third projection are connected to the bent position of the second projection. The first projection and the second projection are connected in one-to-one correspondence.

[0035] The convex structure is bent into a U shape. The first projection and the third projection are connected to the bent position of the second projection. A plurality of the first projections are all connected to the same second projection.

[0036] The first-shot core is evenly spaced with a plurality of grooves.

[0037] The first shot fixed mold core 1 is provided with a third exhaust groove, and two ends of the third exhaust groove are respectively connected to an edge position of the first shot fixed mold core 1 and a shot cavity.

[0038] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these should all be considered within the scope described in this specification.

Claims

1. A two-color mold exhaust structure, characterized in that: It includes a first-shot fixed mold core, a second-shot fixed mold core and several moving mold cores. The moving mold cores are arranged below the first-shot fixed mold core and the second-shot fixed mold core. The moving mold cores are provided with moving mold cavities and moving mold exhaust grooves. The first-shot fixed mold core is provided with a first-shot cavity for forming a first-shot injection molded part. The second-shot fixed mold core is provided with a first-shot receiving groove for placing the first-shot injection molded part, a second-shot cavity for forming a second-shot injection molded part, a first exhaust groove and a second exhaust groove. The second-shot cavity is arranged at the central position of the first-shot receiving groove. The first exhaust groove is arranged on one side of the first-shot receiving groove. The second exhaust groove includes a straight section and a bent section. The bent section is arranged on the inner wall of the first-shot receiving groove. The first exhaust groove, the straight section and the bent section are connected in sequence. The second-shot cavity projects onto the moving mold core along the mold closing direction to form a first projection. The inner wall of the first-shot cavity is provided with a convex structure. The convex structure projects onto the moving mold core along the mold closing direction to form a second projection. The bent section projects onto the moving mold core along the mold closing direction to form a third projection. The first projection, the second projection and the third projection are connected in sequence.

2. The exhaust structure of the two-color mold according to claim 1, characterized in that: The first exhaust groove includes a first groove and a second groove. The second groove surrounds one end of the first-shot receiving groove. Two ends of the first groove are respectively connected to the edge position of the second-shot fixed mold core and the central position of the second groove. The second groove is bent into a U shape.

3. The exhaust structure of the two-color mold according to claim 2, characterized in that: A first-shot core is arranged at the central position of the first-shot cavity. Two ends of the convex structure respectively abut against the inner wall of the first-shot cavity and the first-shot cavity.

4. The exhaust structure of the two-color mold according to claim 1, characterized in that: The convex structure is arranged at one end of the first-shot cavity.

5. The exhaust structure of the two-color mold according to claim 1, wherein: The convex structure is a long strip structure with a rectangular cross section.

6. The exhaust structure of the two-color mold according to claim 1, wherein: Two ends of the convex structure gradually narrow along the extending direction.

7. The exhaust structure of the two-color mold according to claim 5, characterized in that: The convex structure is bent into an L shape. The first projection and the third projection are connected to the bent position of the second projection. The first projection and the second projection are connected in one-to-one correspondence.

8. The exhaust structure of the two-color mold according to claim 5, wherein: The convex structure is bent into a U shape. The first projection and the third projection are connected to the bent position of the second projection. A plurality of the first projections are all connected to the same second projection.

9. The exhaust structure of the two-color mold according to claim 3, wherein: A plurality of grooves are evenly spaced on the first-shot core.

10. The exhaust structure of the two-color mold according to claim 1, wherein: The first-shot fixed mold core is provided with a third exhaust groove. Two ends of the third exhaust groove are respectively connected to the edge position of the first-shot fixed mold core and the first-shot cavity.

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