Thin-wall shell forming die

Abstract

The utility model relates to a thin-wall shell forming die which comprises an upper die and a lower die, a containing groove is formed in the middle of the upper side of the lower die, a lower die core is arranged in the containing groove, a lower middle plane is arranged on the upper side of the lower die core, lower inclined planes are arranged at the two ends of the lower middle plane, and lower outer planes are arranged on the outer sides of the lower inclined planes. A lower forming groove is formed in the position of the lower inclined face, a protruding mold core is arranged in the middle of the forming groove, an upper mold core is arranged on the lower side of the upper mold, an upper middle plane, an upper inclined face and an upper outer plane are correspondingly arranged on the lower side face of the upper mold core, an upper forming groove corresponding to the protruding mold core is formed in the upper inclined face of the upper mold core, and a lower forming groove corresponding to the protruding mold core is formed in the lower inclined face of the upper mold core. The lower forming groove and the protruding mold core can form a certain inclination in the vertical direction, the mold opening process after injection molding is facilitated, at the moment, the arranged lower inclined face can also be used as a positioning structure when the upper mold and the lower mold are closed so as to improve the alignment degree when the upper mold and the lower mold are closed, and therefore the product forming precision is improved.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a thin-wall shell forming mold. Background Art

[0002] Mold forming is a process in which a cavity that matches the shape of the product is set, raw materials are injected by injection molding, and the mold is formed after cooling. In the existing technology, for thin shell products, the upper mold and the lower mold are generally used to form a cavity that matches the thickness of the product. When the side of the product has a certain inclination, in order to facilitate mold opening, the mold core is generally set as a movable mold core. The movable mold core is separated from the product during or after mold opening to complete the production of the product. However, this structure is relatively complicated and the production efficiency is also low. Utility Model Content

[0003] Based on this, it is necessary to provide a thin-wall shell forming die to address the problems in the prior art.

[0004] A thin-walled shell forming mold, characterized in that it includes an upper mold and a lower mold, a receiving groove is provided at the middle position of the upper side of the lower mold, a lower mold core is provided in the receiving groove, a lower middle plane is provided on the upper side of the lower mold core, lower inclined surfaces are provided at both ends of the lower middle plane, a lower outer plane is provided on the outer side of the lower inclined surface, a lower molding groove is provided at the position of the lower inclined surface, a raised convex mold core is provided in the middle of the molding groove, an upper mold core is provided on the lower side of the upper mold, and the lower side surface of the upper mold core is provided with a corresponding upper middle plane, upper inclined surface and upper outer plane, and the upper inclined surface of the upper mold core is provided with an upper molding groove corresponding to the convex mold core.

[0005] In one embodiment, a lower ejector block and a lower ejector plate are further provided on the lower side of the lower mold; a lower guide rod is provided between the lower ejector plate and the upper and lower molds; a sleeved elastic member is provided on the outer side of the lower guide rod; an ejector rod is provided on the upper side of the lower ejector plate; an ejection hole is provided in the lower molding groove of the upper mold; and the upper side of the ejector rod extends to the ejection hole position.

[0006] In one embodiment, the raised mold core is provided with a lower connecting groove connected to the bottom of the lower mold, and a first mold core is provided at the position of the lower connecting groove. The upper side of the first mold core is exposed outside the lower connecting groove to form a mold core for molding products.

[0007] In one embodiment, the top of the first mold core is a curved surface.

[0008] In one embodiment, a corresponding first upper groove is provided at the upper molding groove position of the upper mold, and after the upper mold and the lower mold are closed, the first mold core is located in the first upper groove.

[0009] In one embodiment, the upper mold is provided with an exhaust hole, the lower side of the exhaust hole is connected to the first upper groove, the exhaust hole is a stepped hole, an exhaust rod is provided in the exhaust hole, the lower end of the exhaust rod is flush with the bottom of the exhaust hole, and an exhaust gap is provided between the exhaust rod and the exhaust hole.

[0010] In one embodiment, the lower mold core is provided with positioning grooves, and the positioning grooves are located at four corner positions of the lower mold core, and the upper mold core is provided with corresponding positioning protrusions.

[0011] The above-mentioned thin-walled shell forming mold sets the lower mold core as the lower middle plane in the middle position, and sets lower inclined surfaces on both sides of the lower middle plane. At this time, the lower molding groove is located at the position of the lower inclined surface. In this way, the lower molding groove is set at an angle, so that the convex mold core is also set at an angle. In this way, the lower molding groove and the convex mold core can form a certain slope in the vertical direction, which is convenient for the mold opening process after injection molding. At this time, the set lower inclined surface can also be used as a positioning structure for the upper mold and the lower mold when the mold is closed, so as to improve the alignment of the upper mold and the lower mold when they are closed, thereby improving the product molding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the lower die structure of the thin-walled shell forming die of the utility model;

[0013] Figure 2 This is a schematic diagram of the upper die structure of the thin-walled shell forming die of the utility model;

[0014] Figure 3 This is a structural diagram of the thin-walled shell forming mold of the utility model after removing the lower mold core;

[0015] Figure 4 This is a schematic diagram of the cross-sectional view of the thin-walled shell forming mold of the utility model;

[0016] Among them, 1. upper mold; 11. upper mold core; 2. lower mold; 21. lower mold core; 211. lower middle plane; 212. lower inclined surface; 213. lower outer plane; 214. lower molding groove; 215. raised mold core; 22. ejector pin; 23. first mold core; 24. positioning groove; 25. positioning protrusion; 3. exhaust rod. DETAILED DESCRIPTION

[0017] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only."

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] like Figures 1 to 4 As shown, a thin-walled shell forming mold is characterized in that it includes an upper mold 1 and a lower mold 2, and the lower mold 2 is provided with a receiving groove in the middle position of the upper side, and a lower mold core 21 is provided in the receiving groove, and a lower middle plane 211 is provided on the upper side of the lower mold core 21, and lower inclined surfaces 212 are provided at both ends of the lower middle plane 211, and a lower outer plane 213 is provided on the outer side of the lower inclined surface 212, and a lower molding groove 214 is provided at the position of the lower inclined surface 212, and a raised convex mold core 215 is provided in the middle of the molding groove, and an upper mold core 11 is provided on the lower side of the upper mold 1, and the lower side surface of the upper mold core 11 is provided with a corresponding upper middle plane, upper inclined surface and upper outer plane, and the upper inclined surface of the upper mold core 11 is provided with an upper molding groove corresponding to the convex mold core 215.

[0021] The lower mold core 21 is set as a lower middle plane 211 in the middle position, and lower inclined surfaces 212 are set on both sides of the lower middle plane 211. At this time, the lower molding groove 214 is located at the position of the lower inclined surface 212. In this way, the lower molding groove 214 is set at an angle, so that the convex mold core 215 is also set at an angle. In this way, the lower molding groove 214 and the convex mold core 215 can form a certain slope in the vertical direction, which is convenient for the mold opening process after injection molding. At this time, the set lower inclined surface 212 can also be used as a positioning structure for the upper mold 1 and the lower mold 2 when the mold is closed, so as to improve the alignment of the upper mold 1 and the lower mold 2 when they are closed, thereby improving the product molding accuracy.

[0022] After molding, in order to eject the product in the cavity, in this embodiment, a lower ejector block and a lower ejector plate are further provided on the lower side of the lower mold 2. A lower guide rod is provided between the lower ejector plate and the upper and lower molds 2. A sleeved elastic member is provided on the outer side of the lower guide rod. An ejector pin 22 is provided on the upper side of the lower ejector plate. The lower molding groove 214 of the upper mold 1 is provided with an ejection hole. The upper side of the ejector pin 22 extends to the position of the ejection hole. Under the action of the lower ejector plate, the ejector pin 22 moves upward, thereby ejecting the product molded in the lower molding groove 214. At this time, due to the inclined setting of the lower molding groove 214, the top position of the ejector pin 22 is also inclined. When the ejector pin 22 is not ejected, the top of the ejector pin 22 is flush with the bottom of the lower molding groove 214, which is used to form the bottom position of the product.

[0023] At this time, a raised portion is also provided at the top position of the product. The thickness of the raised portion is relatively small. If a structure integrated with the raised mold core 215 is adopted, there will be certain difficulties in production and processing. Therefore, in this embodiment, the raised mold core 215 is provided with a lower connecting groove connected to the bottom of the lower mold 2. The first mold core 23 is provided at the position of the lower connecting groove. The upper side of the first mold core 23 is exposed on the outside of the lower connecting groove, forming a mold core for molding products. At this time, the first mold core 23 is in the lower connecting groove. Before injection molding, after the upper mold 1 and the lower mold 2 are closed, the mold core of the first ejector pin 22 is partially exposed on the upper side of the lower connecting groove, thereby forming a mold core for molding products. At this time, the first mold core 23 can be processed separately. After the processing is completed, it is connected to the lower connecting groove by interference fit, thereby realizing the assembly of the first mold core 23 and the lower mold core 21, thereby simplifying the production and processing technology.

[0024] At this time, in order to facilitate demoulding of the product from the first mold core 23, the top of the first mold core 23 is an arc surface, so that during the demoulding process, the first mold core 23 and the product can be quickly separated without mold jamming.

[0025] Correspondingly, in order to form the product outside the first mold core 23, in this embodiment, a corresponding first upper groove is provided at the upper molding groove position of the upper mold 1. After the upper mold 1 and the lower mold 2 are closed, the first mold core 23 is located in the first upper groove.

[0026] At this time, the feed channel connected to the cavity is located at the side of the lower molding groove 214. Therefore, to avoid the situation where the air in the lower molding groove 214 cannot be discharged, resulting in underfilling, in this embodiment, the upper mold 1 is provided with a vent hole. The lower side of the vent hole is connected to the first upper groove. The vent hole is a stepped hole. The vent hole is provided with a vent rod 3. The lower end of the vent rod 3 is flush with the bottom of the vent hole. An venting gap is provided between the vent rod 3 and the vent hole. The venting gap allows the air in the lower molding groove 214 to be discharged. Therefore, during the injection molding process, the raw material can fill the mold cavity, avoiding the situation where underfilling occurs and thus causing product defects, thereby improving the molding quality of the product.

[0027] To better position the upper mold core 11 and lower mold core 21 during the closing process of the upper mold 1 and lower mold 2, in this embodiment, the lower mold core 21 is provided with positioning grooves 24 located at the four corners of the lower mold core 21, and the upper mold core 11 is provided with corresponding positioning protrusions 25. The positioning grooves 24 and positioning protrusions 25 at the four corners further improve the alignment accuracy of the upper mold core 11 and lower mold core 21 when the upper mold core 11 and lower mold core 21 are closed, based on the existing guide columns.

[0028] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0029] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A thin-walled shell forming mold, characterized in that: It includes an upper mold and a lower mold, a receiving groove is provided at the middle position of the upper side of the lower mold, a lower mold core is provided in the receiving groove, a lower middle plane is provided on the upper side of the lower mold core, lower inclined surfaces are provided at both ends of the lower middle plane, a lower outer plane is provided on the outer side of the lower inclined surface, a lower molding groove is provided at the position of the lower inclined surface, a raised molding core is provided in the middle of the molding groove, an upper mold core is provided on the lower side of the upper mold, a corresponding upper middle plane, an upper inclined surface and an upper outer plane are provided on the upper inclined surface of the upper mold core.

2. The thin-walled shell forming mold according to claim 1, characterized in that: A lower ejector block and a lower ejector plate are further provided on the lower side of the lower mold; a lower guide rod is provided between the lower ejector plate and the upper and lower molds; a sleeved elastic member is provided on the outer side of the lower guide rod; an ejector rod is provided on the upper side of the lower ejector plate; an ejection hole is provided on the lower molding groove of the upper mold; and the upper side of the ejector rod extends to the ejection hole position.

3. The thin-walled shell forming mold according to claim 2, characterized in that: The raised mold core is provided with a lower connecting groove connected to the bottom of the lower mold, and a first mold core is provided at the position of the lower connecting groove. The upper side of the first mold core is exposed outside the lower connecting groove to form a mold core for molding products.

4. The thin-walled shell forming mold according to claim 3, characterized in that: The top of the first mold core is a curved surface.

5. The thin-walled shell forming die according to claim 4, characterized in that: A corresponding first upper groove is provided at the upper forming groove position of the upper mold. After the upper mold and the lower mold are closed, the first mold core is located in the first upper groove.

6. The thin-walled shell forming die according to claim 5, characterized in that: The upper mold is provided with an exhaust hole, the lower side of the exhaust hole is connected to the first upper groove, the exhaust hole is a stepped hole, an exhaust rod is provided in the exhaust hole, the lower end of the exhaust rod is flush with the bottom of the exhaust hole, and an exhaust gap is provided between the exhaust rod and the exhaust hole.

7. The thin-walled shell forming die according to claim 6, characterized in that: The lower mold core is provided with positioning grooves, and the positioning grooves are located at the four corner positions of the lower mold core, and the upper mold core is provided with corresponding positioning protrusions.

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