Two-section type mold opening structure

Abstract

The utility model discloses a two-section type mould opening structure which is characterized by comprising a front mould, a push plate and a rear mould, a forming core is fixed on the rear mould, a core hole and two forming slide blocks are arranged on the push plate, forming grooves are arranged on the forming slide blocks, a forming end of the forming core penetrates through the core hole and is positioned between the two forming grooves, and the two forming slide blocks are fixed on the front mould. A temporary connecting structure and a limiting structure are arranged between the front mold and the push plate, a pitched roof structure is arranged between the forming sliding block and the front mold, the front mold drives the push plate and the forming sliding block to move together through the temporary connecting structure, and the push plate is limited by the limiting structure to be separated from the front mold after moving to a certain distance. And after the front mold is separated from the push plate, the molding slide block is driven to move through the inclined ejection structure so as to be separated from the plastic part.

Description

Technical Field

[0001] The utility model relates to an injection mold, in particular to a two-stage mold opening structure. Background Art

[0002] A multi-section cylindrical plastic part needs to be ejected from the forming mandrel by a pin against the step surface on the outer wall of the plastic part in the opening mode. Because the contact surface between the plastic part and the forming mandrel is large and the plastic part wraps the forming mandrel tightly, and the pin is thin, the contact surface between the pin and the step surface is also small. Therefore, after the front template is opened, the pin needs a lot of force to eject the plastic part, which can easily damage the plastic part.

[0003] Therefore, the applicant has designed a two-stage mold opening structure to solve the above problems. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a two-stage mold opening structure.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A two-stage mold opening structure, characterized in that it includes a front mold, a push plate and a rear mold, a molding core is fixed on the rear mold, a core hole and two molding slides are provided on the push plate, a molding groove is provided on the molding slide, the molding end of the molding core passes through the core hole and is located between the two molding grooves, a temporary connection structure and a limiting structure are provided between the front mold and the push plate, a slanted top structure is provided between the molding slide and the front mold, the front mold drives the push plate and the molding slide to move together through the temporary connection structure, and after the push plate moves to a certain distance, it is separated from the front mold by the limitation of the limiting structure, and after the front mold is separated from the push plate, the molding slide is driven to move by the slanted top structure to separate from the plastic part.

[0007] The temporary connection structure comprises a rubber plug and a fastening hole arranged on the push plate, one end of the rubber plug is fixed to the front mold, and the other end of the rubber plug is tightly matched with the fastening hole.

[0008] The rubber plug is fixed to the front mold through threads.

[0009] The limiting structure includes a rivet arranged on the rear mold, a nail hole and a limiting hole arranged on the push plate, the bottom of the limiting hole is provided with a nail hole, the rivet is fixed to the rear mold through the nail hole, and the nail cap of the rivet is located in the limiting hole and can be abutted against the bottom of the limiting hole to limit the movement of the push plate.

[0010] A T-shaped slide groove is provided on the push plate, a T-shaped slide block matching the T-shaped slide groove is provided on the forming slide block, the inclined top structure includes an inclined top rod, an inclined top hole 1 provided on the forming slide block, and an inclined top block provided on the front mold, the inclined top block is provided with an inclined top hole 2, the inclined top rod is located in the inclined top hole 1 and the inclined top hole 2, and the end of the inclined top rod is provided with a limiting ring that can resist the inclined top block.

[0011] The beneficial effect of the utility model is that the utility model forms a two-stage mold opening structure through a temporary connection structure, a limit structure, a push plate and two molding slide blocks. When the front mold opens and moves, the front mold drives the push plate and moves together with the two molding slide blocks through the temporary connection structure. Because the molding slide blocks tightly wrap the plastic parts and there are concave and convex structures embedded between the two, the molding slide blocks can drive the plastic parts to separate from the molding mandrel, and then the molding slide blocks are separated by the front mold and the inclined ejection structure. Finally, the ejector pin completely ejects the plastic parts from the molding mandrel. At this time, the combination between the plastic parts and the molding mandrel is no longer tight, so the ejector pin only needs a small force to eject the plastic parts, thereby avoiding damage to the plastic parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is an overall view of the utility model;

[0014] Figure 2 The utility model is an explosion-proof Figure 1 ;

[0015] Figure 3 It is the overall view of the utility model Figure 2 ;

[0016] Figure 4 It is a cross-sectional view through the rivet;

[0017] Figure 5 It is a structural view of the rubber plug. DETAILED DESCRIPTION

[0018] The advantages and features of the present disclosure and its implementation methods will be explained by the following embodiments described with reference to the accompanying drawings. However, the present disclosure can be embodied in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be comprehensive and complete, and will fully convey the scope of the present disclosure to those skilled in the art. In addition, the present disclosure is limited only by the scope of the claims.

[0019] The shapes, sizes, ratios, angles and numbers disclosed in the drawings for describing the embodiments of the present disclosure are only examples, and therefore the present disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, when the detailed description of the relevant known functions or configurations is determined to be unnecessary to blur the focus of the present disclosure, the detailed description will be omitted. In the case of using "including", "having" and "comprising" described in this specification, other parts may be added unless "only" is used. Unless otherwise indicated, the terms in the singular may include plural forms.

[0020] When explaining an element, although not explicitly described, the element is understood to include a range of error.

[0021] When describing a positional relationship, for example, when the positional relationship is described as "on," "above," "below," and "adjacent to," unless "immediately" or "directly" is used, one or more parts may be arranged between two other parts.

[0022] When describing a time relationship, for example, when a time sequence is described as “after,” “subsequently,” “next,” and “before,” discontinuous cases may be included unless “just” or “directly” is used.

[0023] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present disclosure.

[0024] As those skilled in the art can fully understand, the features of the different embodiments of the present disclosure can be coupled or combined with each other in part or in whole, and can cooperate with each other in various ways and be driven technically. The embodiments of the present disclosure can be performed independently of each other, or can be performed together in a mutually dependent relationship.

[0025] Reference Figures 1 to 5The utility model discloses a two-stage mold opening structure, including a front mold 1, a push plate 2 and a rear mold 3. A molding core 4 is fixed on the rear mold 3. The push plate 2 is provided with a core hole and two molding slide blocks 5. The molding slide block 5 is provided with a molding groove 6. The molding end of the molding core 4 passes through the core hole and is located between the two molding grooves 6. The front mold 1 is provided with an insert groove. The molding slide block 5 is located in the insert groove. There is a molding cavity between the molding core 4 and the molding groove 6. Of course, there is a pinhole 7 on the molding core 4. The ejector pin is located in the pinhole 7. The structure of the ejector pin 8 is an existing structure and is not described in detail. A temporary connection structure and a limiting structure are provided between the front mold 1 and the push plate 2. A sloping top structure is provided between the molding slide block 5 and the front mold 1. The front mold 1 drives the push plate 2 and the molding slide block 5 to move together through the temporary connection structure. After the push plate 2 moves to a certain distance, it is limited by the limiting structure and separated from the front mold 1. After the front mold 1 is separated from the push plate 2, the sloping top structure drives the molding slide block 5 to move so as to separate from the plastic part 9.

[0026] The above structure realizes two-stage ejection: when the front mold 1 opens and moves, the front mold 1 drives the push plate 2 and the two molding slide blocks 5 to move together through the temporary connection structure. Because the molding slide block 5 tightly wraps the plastic part 9 and there is a concave and convex structure embedded between the two, the molding slide block 5 can drive the plastic part 9 to separate from the molding core 4 to achieve one-time demolding; after the front mold 1 moves to a certain distance, the limiting structure begins to limit the position of the push plate 2, the push plate 2 is fixed and the front mold 1 continues to move. At this time, the temporary connection structure is broken, so that the front mold 1 is separated from the push plate 2, and at the same time, the front mold 1 uses the inclined ejection structure to make the two molding slide blocks 5 move back to back in the direction perpendicular to the movement of the front mold 1, thereby separating from the plastic part 9, and finally the ejector pin 8 completely ejects the plastic part 9 from the molding mandrel to achieve secondary demolding. At this time, the combination between the plastic part 9 and the molding mandrel is no longer tight, so the ejector pin 8 only needs a small force to eject the plastic part 9, thereby avoiding damage to the plastic part 9.

[0027] As shown in the figure, the temporary connection structure includes a rubber plug 10 and a fastening hole arranged on the push plate 2. One end of the rubber plug 10 is fixed to the front mold 1 through a thread, and the other end of the rubber plug 10 is tightly fitted with the fastening hole. The rubber plug 10 is a purchased part, so the specific structure is not described in detail. When the front mold 1 is separated from the push plate 2, the other end of the rubber plug 10 will fall out of the fastening hole.

[0028] As shown in the figure, the limiting structure includes a rivet 11 arranged on the rear mold 3, a rivet hole and a limiting hole 12 arranged on the push plate 2, the rivet hole and the bottom of the limiting hole 12 are connected, the rivet 11 passes through the rivet hole and is threadedly connected and fixed to the rear mold 3, and the rivet cap 13 of the rivet 11 is located in the limiting hole 12 and can be against the bottom of the limiting hole 12 to limit the movement of the push plate 2, the height of the limiting hole 12 is greater than the thickness of the rivet cap 13, so the push plate 2 will not be against the rivet cap 13 until one end of the push plate 2 moves to the bottom of the limiting hole 12, thereby limiting the movement of the push plate 2.

[0029] As shown in the figure, a T-shaped slot 14 is provided on the push plate 2, and a T-shaped slider 15 matching the T-shaped slot 14 is provided on the forming slider 5. The inclined top structure includes an inclined top rod 16, an inclined top hole 17 arranged on the forming slider 5, and an inclined top block 18 arranged on the front mold 1. The inclined top block 18 is fixed to the front mold 1 by screws, and an inclined top hole 2 19 is provided on the inclined top block 18. The inclined top rod 16 is located in the inclined top hole 17 and the inclined top hole 2 19, and a limiting ring that can resist the inclined top block 18 is provided at the end of the inclined top rod 16. When the front mold 1 opens and moves, the inclined top block 18 will be driven to move together, and the inclined top block 18 drives the inclined top rod 16 to move by resisting the limiting ring, and the forming slider 5 will move in a direction perpendicular to the movement of the front mold 1 under the joint action of the inclined top rod 16 and the T-shaped slot 14, thereby separating from the plastic part 9.

[0030] A two-stage mold opening structure provided by an embodiment of the utility model is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model; at the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A two-stage mold opening structure, characterized in that: It includes a front mold, a push plate and a rear mold, a molding core is fixed on the rear mold, a core hole and two molding slide blocks are provided on the push plate, a molding groove is provided on the molding slide block, a molding end of the molding core passes through the core hole and is located between the two molding grooves, a temporary connection structure and a limiting structure are provided between the front mold and the push plate, a slanted top structure is provided between the molding slide block and the front mold, the front mold drives the push plate and the molding slide block to move together through the temporary connection structure, and after the push plate moves to a certain distance, it is separated from the front mold by the limitation of the limiting structure, and after the front mold is separated from the push plate, the molding slide block is driven to move by the slanted top structure to be separated from the plastic part.

2. A two-stage mold opening structure according to claim 1, characterized in that: The temporary connection structure comprises a rubber plug and a fastening hole arranged on the push plate, one end of the rubber plug is fixed to the front mold, and the other end of the rubber plug is tightly matched with the fastening hole.

3. A two-stage mold opening structure according to claim 2, characterized in that: The rubber plug is fixed to the front mold through threads.

4. A two-stage mold opening structure according to claim 1, characterized in that: The limiting structure includes a rivet arranged on the rear mold, a nail hole and a limiting hole arranged on the push plate, the bottom of the limiting hole is provided with a nail hole, the rivet is fixed to the rear mold through the nail hole, and the nail cap of the rivet is located in the limiting hole and can be abutted against the bottom of the limiting hole to limit the movement of the push plate.

5. The two-stage mold opening structure according to claim 1, characterized in that: A T-shaped slide groove is provided on the push plate, a T-shaped slide block matching the T-shaped slide groove is provided on the forming slide block, the inclined top structure includes an inclined top rod, an inclined top hole 1 provided on the forming slide block, and an inclined top block provided on the front mold, the inclined top block is provided with an inclined top hole 2, the inclined top rod is located in the inclined top hole 1 and the inclined top hole 2, and the end of the inclined top rod is provided with a limiting ring that can resist the inclined top block.

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