Die assembly anti-collision mechanism for inner sealing surface of die

Abstract

The invention discloses a mold closing anti-collision mechanism for a sealing surface in a mold, the mold closing anti-collision mechanism comprises a core-pulling slide block and a straight ejection assembly, the straight ejection assembly comprises an ejector rod and an ejector block fixed at the top end of the ejector rod, and the lower end of the ejector rod downwards penetrates through a rear mold and is fixedly mounted on an ejector plate. The edge of the sharp corner at the bottom of the front end of the core-pulling slide block and the top end surface of the ejection block form a glue sealing surface in a mold closing state; the top end face of the ejection block is sequentially provided with an inclined lower sealing glue face, a buffering press-in face and a large C-angle inclined face from the side close to the product forming side. Correspondingly, the bottom face of the front end in the core-pulling sliding block is sequentially provided with an upper glue sealing face and a touch face. In the mold closing action process, the sharp corner edge of the bottom of the front end of the core-pulling sliding block is not in contact with the ejection block all the time. The structure is simple, the three sections of inclined planes arranged on the straight ejection block are ingeniously utilized, the problem that the sharp corner edge of the bottom of the front end in the core-pulling sliding block collides with the straight ejection block is effectively solved, the integrity of a glue sealing surface is guaranteed, and the product forming quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a mold closing anti-collision mechanism for a sealing surface inside a mold. Background Art

[0002] Injection mold is a tool for producing plastic products; it is also a tool that gives plastic products a complete structure and precise size; when it is used, the heated and melted plastic is injected into the mold cavity by the injection molding machine under high pressure, and after cooling and solidification, a molded product is obtained. When the product is ejected after injection molding, the slider at the corresponding position in the mold structure withdraws first, and then the straight top pushes the product upward; before closing the mold, the straight top is first retracted, and the slider is reset. There are some problems in this process. For example, when the straight top is retracted, it has not been reset to the bottom, or it is not retracted enough, there is a reset error of no more than 1mm, which will form a certain protrusion height. In addition, in the traditional mold design, the sealing surface on the straight top is an integral flat inclined surface, and the edge of the straight top is also set at a right angle. At this time, if the slider is reset under its power drive, it is easy to hit the mold, or the slider and the straight top are forced to slide and rub to reset, so that the sealing surface between the slider and the straight top is damaged, resulting in the overflow of the material liquid at the sealing surface during injection molding, affecting the molding quality of the entire product; at the same time, its maintenance cost is increased, and it is inconvenient to replace, causing damage to the mold and affecting the work efficiency of injection molding. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies in the above-mentioned prior art and to provide a mold closing anti-collision mechanism for the sealing surface inside a mold.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a mold closing anti-collision mechanism for the sealing surface in the mold, comprising a core pulling slider and a straight ejector assembly, wherein the straight ejector assembly comprises an ejector block and an ejector rod, the ejector block is fixedly installed on the top end of the ejector rod, the lower end of the ejector rod passes through the rear mold and the ejector plate in sequence downward, and is fixedly installed on the bottom surface of the ejector panel in the ejector plate; the sharp corner edge of the front end bottom of the core pulling slider contacts with the top end surface of the ejector block in the mold closing state to form a sealing surface; the top end surface of the ejector block is provided with a plurality of sections of mutually connected inclined surfaces, which are a lower sealing surface, a buffer pressing surface and a large C-angle inclined surface in sequence from the side close to the product molding to the side of the core pulling slider, and correspondingly, an upper sealing surface and a contact surface are provided in sequence on the front end bottom surface of the core pulling slider; during the mold closing action, the sharp corner edge of the front end bottom of the core pulling slider is always not in contact with the ejector block.

[0005] Furthermore, the inclination angle of the buffer pressing surface in the top end surface of the ejection block is smaller than the setting angle of the lower sealing surface, the inclination angle of the large C-angle inclined surface is larger than the setting angle of the lower sealing surface; the setting length of the buffer pressing surface is smaller than the setting length of the lower sealing surface.

[0006] Furthermore, the upper sealing surface of the front end bottom surface of the core-pulling slider is parallel to the lower sealing surface of the ejection block, the inclination angle of the contact surface is smaller than the inclination angle of the upper sealing surface, and is parallel to the buffer pressing surface of the ejection block.

[0007] Furthermore, during the mold closing process, when the straight ejector assembly is reset to the bottom, the core pulling slider slides directly to the sealing surface position under the action of its driving force, and the sharp edge of the bottom front end of the core pulling slider fits tightly with the lower sealing surface in the middle of the top end surface of the ejector block.

[0008] Furthermore, during the mold closing process, when the above-mentioned straight ejector assembly has not been reset to the bottom, the contact surface on the core-pulling slider first slides in contact with the top angle of the large C-angle inclined surface on the ejection block to press the straight ejector assembly downward, and then the corner between the contact surface and the upper sealing surface slides in contact with the buffer pressing surface on the ejection block, and the straight ejector assembly is pressed downward again until the sharp corner edge at the bottom of the front end of the above-mentioned core-pulling slider is tightly fitted with the middle and lower sealing surface of the top end surface of the ejection block.

[0009] Furthermore, a guide block is fixedly mounted on the bottom surface of the rear mold by countersunk bolts, and the ejector rod is slidably inserted into the through hole of the guide block.

[0010] Furthermore, the rear end side of the core-pulling slider is connected to the end of the piston rod of the driving cylinder, and the driving cylinder is fixedly mounted on the rear mold.

[0011] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a simple structure, and utilizes the design and coordination of the three inclined surfaces on the straight top ejection block to effectively avoid the collision between the sharp corner edge of the bottom front end of the core pulling slider and the straight top, prevent damage to the sealing surface, ensure the integrity of the sharp corner sealing surface of the core pulling slider, improve product molding quality, reduce maintenance costs, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 A longitudinal cross-sectional view of the present invention at the center of the ejector rod;

[0014] Figure 3 for Figure 2 A magnified view of the structure of part A;

[0015] Figure 4 It is a structural schematic diagram of the straight top assembly in the present invention;

[0016] Figure 5 for Figure 4 A magnified view of the structure of part B;

[0017] Figure 6 It is a side view of the ejection block in the present invention;

[0018] Figure 7 It is a front bottom side view of the core pulling slider in the present invention;

[0019] Figure 8 It is a schematic diagram of the matching action before mold closing of the present invention;

[0020] In the figure: 1, rear mold, 2, ejector plate, 3, bottom plate, 4, core-pulling slider, 5, straight ejector assembly, 6, product, 7, sealing surface, 41, sharp edge of the bottom front end, 42, upper sealing surface, 43, contact surface, 51, ejector block, 52, ejector rod, 53, guide block, 511, lower sealing surface, 512, buffer pressing surface, 513, large C-angle inclined surface. DETAILED DESCRIPTION

[0021] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "center", "one side", "other side" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various components in the present invention, and do not specifically mean that any component in the present invention must have a specific direction, be constructed and operated in a specific direction, and should not be understood as a limitation on the present invention.

[0022] In the invention, the descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence. They are only used to distinguish components or operations described with the same technical terms. It should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0024] like Figures 1 to 7As shown, a mold closing anti-collision mechanism for the sealing surface in the mold is mainly arranged on the rear mold side, including a core-pulling slider 4 and a straight ejector assembly 5, wherein the core-pulling slider 4 is slidably installed on the rear mold 1, and its rear end is connected to the piston rod end of the driving cylinder, and the driving cylinder is fixedly installed on the rear mold 1. In the mold closing state, the core-pulling slider 4 can fit tightly with the top of the straight ejector assembly 5 to enclose a part of the product molding cavity, and the sealing surface 7 is between the two. The straight ejector assembly 5 includes an ejector block 51 and an ejector rod 52, wherein the ejector block 51 is fixedly installed on the top of the ejector rod 52, and the lower end of the ejector rod 52 passes through the rear mold 1 and the ejector plate 2 downward in turn, and is fixedly installed to the bottom surface of the ejector panel in the ejector plate 2 by a countersunk bolt; a guide block 53 is also fixedly installed on the bottom surface of the rear mold 1 to adapt to the setting position of the ejector rod 52, and the ejector rod 52 is slidably installed in the guide through hole of the rear mold 1 and the guide block 53.

[0025] Combination Figure 3 As shown, the sharp edge 41 at the bottom front end of the core-pulling slider 4 contacts the top end surface of the ejection block 51 in the mold-closing state to form a sealing surface 7. The top end surface of the ejection block 51 is provided with three sections of inclined surfaces connected in sequence, from the side close to the product 6 molding to the side close to the core-pulling slider, which are the lower sealing surface 511, the buffer pressing surface 512 and the large C-angle inclined surface 513, wherein the inclination angle of the buffer pressing surface 512 is smaller than the inclination angle of the lower sealing surface 511, while the inclination angle of the large C-angle inclined surface 513 is larger than the inclination angle of the lower sealing surface 511, and is a chamfered setting close to 45°; at the same time, the setting length of the buffer pressing surface 512 is smaller than the setting length of the lower sealing surface 511. Correspondingly, the front end bottom surface of the core-pulling slider 4 is opposite to the position of the ejection block 51, and an upper sealing surface 42 and a contact surface 43 are provided in sequence from the molding side close to the product 6 to the direction away from it, wherein the upper sealing surface 42 is parallel to the lower sealing surface 511, and the setting angle of the contact surface 43 is smaller than the setting angle of the upper sealing surface 42, and the contact surface 43 is parallel to the buffer pressing surface 512.

[0026] The specific operating principle is as follows: when the product 6 is demolded after injection molding, the core-pulling slider 4 on the rear mold 1 first slides backward under the power of its driving cylinder to avoid the rising space of the straight ejector assembly 5, and then the ejector plate 2 moves upward to drive the ejector rod 52 and the ejector block 51 to eject the product 6 upward. When the product 6 is taken out, during the mold closing action, the above-mentioned straight ejector assembly 5 first resets downward, and when it resets downward to the bottom under normal operation, the core-pulling slider 4 directly slides to the position of the sealing surface 7 under the action of its driving force, and its front end bottom sharp corner edge 41 is tightly fitted with the middle and lower sealing surface 511 of the top end surface of the ejector block 51 to form a sealed sealing surface 7, and then injection molding is performed. If due to the cylinder reset distance error and many other reasons, the straight ejector assembly 5 may not be reset to the bottom, and the ejector block 51 has a maximum height error of about 0.5mm, which protrudes a certain height compared to the normal reset position. At this time, the corresponding detection signal in the mold also shows normal, and then the core pulling slider 4 will slide and reset under the action of its driving force. During the reset process of the core pulling slider 4, due to the inclined surface setting on the bottom surface of its front end, the contact surface 43 first contacts and slides with the top angle position of the large C-angle inclined surface 513 on the ejector block 51, and the straight ejector assembly 5 is forced to be pressed downward. At this time, the large C-angle inclined surface 513 also plays a guiding role; then the corner between the contact surface 43 on the core pulling slider 4 and the upper sealing surface 42 slides with the buffer pressing surface 512 on the ejector block 51, refer to Figure 8 As shown, the straight top assembly 5 is pressed downward again until the upper sealing surface 42 of the core-pulling slider 4 is in contact with the upper and lower sealing surfaces 511 of the ejection block 51, and the straight top assembly 5 is reset downward to the bottom, and the front end bottom sharp corner edge 41 of the core-pulling slider 4 forms a tightly attached sealing surface 7 with the top end surface of the ejection block 51, and then the glue is injected for molding. During the entire mold closing process, the front end bottom sharp corner edge 41 of the core-pulling slider 4 never collides with the ejection block 51, which can effectively avoid the damage of the sealing surface 7 by collision with the mold and improve the molding quality of the product.

[0027] The measurement basis of the above-mentioned inclination angle is based on the angle between the angle and the horizontal plane.

[0028] The integral injection mold may be provided with a plurality of sets of the above-mentioned straight top components 5 and corresponding inclined surfaces. The relevant technical features that have not been mentioned or described in the above-mentioned embodiments can be realized by adopting or drawing on the relevant technical solutions in the prior art.

[0029] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A mold-closing anti-collision mechanism for the sealing surface inside a mold, characterized in that: It comprises a core pulling slider and a straight ejector assembly, wherein the straight ejector assembly comprises an ejector block and an ejector rod, the ejector block is fixedly mounted on the top end of the ejector rod, the lower end of the ejector rod passes downward through the rear mold and the ejector plate in turn, and is fixedly mounted on the bottom surface of the ejector panel in the ejector plate; the sharp corner edge of the front end bottom of the core pulling slider contacts with the top end surface of the ejector block in the mold closing state to form a sealing surface; the top end surface of the ejector block is provided with a plurality of sections of mutually connected inclined surfaces, which are a lower sealing surface, a buffer pressing surface and a large C-angle inclined surface in sequence from the side close to the product molding to the side of the core pulling slider, and correspondingly, an upper sealing surface and a contact surface are provided in sequence on the front end bottom surface of the core pulling slider; during the mold closing action, the sharp corner edge of the front end bottom of the core pulling slider is always not in contact with the ejector block.

2. A mold-closing anti-collision mechanism for the inner sealing surface of a mold according to claim 1, characterized in that: The inclination angle of the buffer pressing surface in the top end surface of the ejection block is smaller than the setting angle of the lower sealing surface, the inclination angle of the large C-angle inclined surface is larger than the setting angle of the lower sealing surface; the setting length of the buffer pressing surface is smaller than the setting length of the lower sealing surface.

3. The mold closing anti-collision mechanism for the inner sealing surface of a mold according to claim 2, characterized in that: The upper sealing surface of the front end bottom surface of the core pulling slider is parallel to the lower sealing surface of the ejection block, the inclination angle of the contact surface is smaller than the inclination angle of the upper sealing surface, and is parallel to the buffer pressing surface of the ejection block.

4. The mold closing anti-collision mechanism for the inner sealing surface of a mold according to claim 3, characterized in that: During the mold closing process, when the straight ejector assembly is reset to the bottom, the core-pulling slider slides directly to the sealing surface position under the action of its driving force, and the sharp edge of the bottom front end of the core-pulling slider fits tightly with the lower sealing surface of the top end of the ejector block.

5. The mold closing anti-collision mechanism for the inner sealing surface of a mold according to claim 3, characterized in that: During the mold closing process, when the above-mentioned straight ejector assembly has not been reset to the bottom, the contact surface on the core-pulling slider first slides in contact with the top angle of the large C-angle inclined surface on the ejection block to press the straight ejector assembly downward, and then the corner between the contact surface and the upper sealing surface slides in contact with the buffer pressing surface on the ejection block, and the straight ejector assembly is pressed downward again until the sharp corner edge at the bottom of the front end of the above-mentioned core-pulling slider is tightly fitted with the middle and lower sealing surface of the top end surface of the ejection block.

6. The mold closing anti-collision mechanism for the inner sealing surface of a mold according to claim 1, characterized in that: A guide block is fixedly mounted on the bottom surface of the rear mold by countersunk bolts, and the ejector rod is slidably inserted into the through hole of the guide block.

7. The mold closing anti-collision mechanism for the inner sealing surface of a mold according to claim 1, characterized in that: The rear end side of the core-pulling slider is connected to the end of the piston rod of the driving cylinder, and the driving cylinder is fixedly installed on the rear mold.

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