SMC (Sheet Molding Compound) mould pressing mould suitable for forming ultrahigh ribs of SMC product

Abstract

The utility model provides an SMC (Sheet Molding Compound) mould pressing mould suitable for forming an ultrahigh rib of an SMC product, which comprises a lower mould, the lower mould is provided with a mould core, the top surface of the mould core is concavely provided with a rib forming groove and a mounting groove, and the rib forming groove is defined by a bottom wall, a first side wall and a second side wall; the first side wall and the second side wall are connected to the two opposite sides of the bottom wall respectively in the width direction of the rib forming groove, and one side of the mounting groove penetrates through at least part of the first side wall to be communicated with the rib forming groove; the lower mold is provided with an ejection mechanism used for ejecting out a product formed on the mold core, the ejection mechanism comprises an ejection block and an ejection driving piece, the ejection block is installed in the installation groove in a sliding mode, and a first exhaust seam communicated with the rib forming groove is formed between the ejection block and the lower mold; and the ejection driving piece is arranged on the lower die and is connected with the ejection block. Products can be prevented from being damaged and cracked during demolding, and the ultrahigh ribs can be completely formed.

Description

Technical Field

[0001] The utility model relates to a mold, in particular to an SMC compression mold suitable for forming ultra-high rib strips of SMC products. Background Art

[0002] SMC hydraulic forming molds are widely used in the production and manufacturing of engineering machinery and automotive parts. The SMC hydraulic forming mold is abbreviated as the SMC compression mold. It directly adds the SMC sheet into the open mold cavity, closes the mold, and the SMC sheet becomes a flowing state under the action of high temperature and pressure and fills the cavity. Then, it is chemically crosslinked under high temperature conditions to harden and shape the product.

[0003] Please refer to Figure 1 , the existing SMC compression mold for forming rib strips of SMC products generally includes a lower mold 10 and an upper mold (not shown in the figure) installed on the top of the lower mold and cooperating with the lower mold 10. The lower mold 10 is provided with a core 11 adapted to the shape of the product and an ejection mechanism 20 for ejecting the product formed on the core 11. The existing ejection mechanism 20 usually adopts ejector pins. For products with rib strips, a rib strip forming groove 110 is correspondingly recessed on the top surface of the core 11 at the position where the rib strips are located. For some products, ultra-high rib strips with a height of not less than 50 mm need to be provided thereon. For example Figure 2 As shown, the product has a rib strip 230, and the highest point of the rib strip 231 is about 58 mm. When manufacturing this product with the existing compression mold, due to the large height of the rib strip, sticking to the mold is likely to occur during the forming process. When the product is ejected, because the contact area between the ejector pin surface and the product is small, the product is easily damaged and cracked during ejection. In addition, when manufacturing products with relatively large rib strip heights using the existing compression mold, there is also a problem that the rib strips cannot be completely formed. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the above-mentioned technical problems, and provides an SMC compression mold suitable for forming ultra-high rib strips of SMC products, which can avoid damaging and cracking the product during demolding and can completely form the ultra-high rib strips.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An SMC compression mold suitable for forming ultra-high rib strips of SMC products, including a lower mold. The lower mold is provided with a core. On the top surface of the core, a rib strip forming groove and an installation groove are recessed. The rib strip forming groove is surrounded by a bottom wall, a first side wall, and a second side wall. The first side wall and the second side wall are respectively connected to opposite sides of the bottom wall along the width direction of the rib strip forming groove. One side of the installation groove penetrates at least part of the first side wall to communicate with the rib strip forming groove; a ejecting mechanism for ejecting the product formed on the core is provided on the lower mold. The ejecting mechanism includes an ejecting block and an ejecting driving member. The ejecting block is slidably installed in the installation groove. A first exhaust gap communicating with the rib strip forming groove is formed between the ejecting block and the lower mold; the ejecting driving member is installed on the lower mold and connected to the ejecting block.

[0007] Further, the depth of the installation groove is greater than the depth of the rib strip forming groove, so that the first exhaust gap communicates with the bottom of the rib strip forming groove.

[0008] Further, the installation groove includes a first groove wall and a second groove wall arranged oppositely. The second groove wall is closer to the rib strip forming groove than the first groove wall. The top of the second groove wall is connected to the bottom wall of the rib strip forming groove. The gap between the ejecting block and the second groove wall constitutes the first exhaust gap.

[0009] Further, the rib strip bends and extends to form a corner. A fixing groove is also recessed on the top surface of the core. The fixing groove is located inside the corner. An insert is fixed in the fixing groove. A second exhaust gap communicating with the rib strip forming groove is formed between the insert and the lower mold.

[0010] Further, the depth of the fixing groove is greater than the depth of the rib strip forming groove, so that the second exhaust gap communicates with the bottom of the rib strip forming groove.

[0011] Further, the fixing groove includes a first groove surface and a second groove surface arranged oppositely. The second groove surface is closer to the rib strip forming groove than the first groove surface. The top of the second groove surface is connected to the bottom wall of the rib strip forming groove. The gap between the ejecting block and the second groove surface constitutes the second exhaust gap.

[0012] Further, an installation cavity communicating with the outside is provided in the lower mold. Both the first exhaust gap and the second exhaust gap communicate the bottom of the rib strip forming groove and the installation cavity.

[0013] Further, the insert block is connected to the lower mold by screws. The lower mold is further provided with a plug hole which communicates with the bottom of the installation cavity and the fixed groove. The screw passes through the plug hole and is threadedly connected to the bottom of the insert block. The second exhaust slit communicates with the installation cavity through the plug hole.

[0014] Further, the ejection driving member is connected to a plurality of the ejector blocks through a connecting member to drive the plurality of ejector blocks to move synchronously. The connecting member is slidably received in the installation cavity.

[0015] Further, the lower mold is provided with a guiding portion, and the ejector block is provided with a guiding portion. The guiding portion is slidably engaged with the guiding portion to guide the movement of the ejector block.

[0016] Due to the adoption of the above technical solutions, the present utility model has the following beneficial effects:

[0017] 1. For the above SMC compression mold suitable for forming ultra-high rib strips of SMC products, the product is ejected by the ejector blocks. Compared with the ejector pins in the prior art, the contact area between the ejector blocks and the product is larger, and the force received by the product can be dispersed. Therefore, during demolding, the product can be effectively prevented from being damaged or cracked by ejection. At the same time, since the ejector blocks are movable, the gap reserved between the ejector blocks and the lower mold forms a first exhaust slit communicating with the rib forming groove. During the product forming process, the gas in the rib forming groove can be discharged through the first exhaust slit, which is beneficial for the material to flow into the rib forming groove, and effectively solves the problem that the ultra-high rib strips cannot be completely formed in actual production due to the large height of the rib strips.

[0018] 2. For the above SMC compression mold suitable for forming ultra-high rib strips of SMC products, when the rib forming groove has a corner, an insert block is further arranged inside the corner. The gap reserved between the insert block and the lower mold forms a second exhaust slit, which is more conducive to the discharge of the gas in the rib forming groove and the flow of the material into the rib forming groove, so that the ultra-high rib strips can be completely formed even when the rib forming groove has a corner. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural view of the lower mold of an SMC compression mold for rib forming of SMC products in the prior art;

[0020] Figure 2 is a structural view of an SMC product with ultra-high rib strips;

[0021] Figure 3 is a structural view of an SMC compression mold suitable for forming ultra-high rib strips of SMC products in a preferred embodiment of the present utility model;

[0022] Figure 4 is Figure 3 a structural view after removing the upper mold;

[0023] Figure 5 is Figure 4 The structural diagram after removing part of the top blocks and inserts;

[0024] Figure 6 is Figure 4 the top view of;

[0025] Figure 7 is Figure 6 the sectional view along line A-A;

[0026] Figure 8 is Figure 6 the sectional view along line B-B;

[0027] In the attached drawings, 100 is an SMC compression mold applicable to the forming of ultra-high rib strips of SMC products; 10 is the lower mold; 11 is the core; 110 is the rib strip forming groove; 111 is the bottom wall; 112 is the first side wall; 113 is the second side wall; 114 is the first rib strip groove; 115 is the second rib strip groove; 116 is the main body groove; 117 is the extension groove; 118 is the installation groove; 1181 is the first groove wall; 1183 is the second groove wall; 119 is the fixing groove; 1191 is the first groove surface; 1193 is the second groove surface; 12 is the insertion hole; 20 is the ejection mechanism; 21 is the top block; 211 is the guiding part; 23 is the ejection driving part; 24 is the first exhaust slit; 30 is the insert; 31 is the second exhaust slit; 34 is the screw; 40 is the installation cavity; 60 is the guiding part; 70 is the connecting part; 80 is the upper mold; 200 is the SMC product; 210 is the body; 230 is the rib strip; 231 is the first rib strip; 232 is the main body part; 233 is the extension part; 234 is the second rib strip. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] Please refer to Figure 2 and Figure 3 , a SMC compression mold 100 applicable to the formation of ultra-high rib strips of SMC products, which is used to form SMC products 200. In this embodiment, the SMC product 200 includes a body 210 and rib strips 230 protruding from one side of the body 210. Specifically, the rib strips 230 include two first rib strips 231 spaced apart from each other and a second rib strip 234 connecting the two first rib strips 231. The first rib strip 231 includes a long strip-shaped main body portion 232 and two extending portions 233 respectively extending from opposite ends of the main body portion 232 toward the same side. A corner is formed at the connection between the extending portion 233 and the main body portion 232; the second rib strip 234 connects the extending portions 233 of the two first rib strips 231.

[0032] The SMC compression mold 100 applicable to the formation of ultra-high rib strips of SMC products includes a lower mold 10 and an upper mold 80 disposed above the lower mold 10 and used in cooperation with the lower mold 10. Please refer to Figure 4 and Figure 5 , a core 11 is provided on the top surface of the lower mold 10, and the shape of the core 11 matches the shape of the body 210 of the product 200. A rib strip forming groove 110 and an installation groove 118 communicating with the rib strip forming groove 110 are recessed on the top surface of the core 11. Please refer to Figure 6 and Figure 7, the rib forming groove 110 is used to form the rib 230. The rib forming groove 110 is surrounded by a bottom wall 111, a first side wall 112 and a second side wall 113. The first side wall 112 and the second side wall 113 are respectively connected to opposite sides of the bottom wall 111 along the width direction of the rib forming groove 110. The rib forming groove 110 bends and extends to form a corner. In this embodiment, the shape of the rib forming groove 110 matches the shape of the rib 230 on the product 200. It includes a first rib groove 114 for forming the first rib 231 and a second rib groove 115 for forming the second rib 234. The first rib groove 114 includes a main body groove 116 for forming the main body portion 232 and extension grooves 117 extending from opposite ends of the main body groove 116 toward the same side. The extension grooves 117 are used to form the extension portions 233. The connection between the extension groove 117 and the main body groove 116 forms the corner of the rib forming groove 110, and the corner of the rib forming groove 110 corresponds to the corner position of the rib 230. Opposite ends of the second rib groove 115 are respectively connected to the extension grooves 117 of the two first rib grooves 114.

[0033] One side of the installation groove 118 penetrates at least part of the first side wall 112 to communicate with the rib forming groove 110. In this embodiment, the number of installation grooves 118 is four. Two of the installation grooves 118 are respectively arranged on the same side of the two main body grooves 116 and communicate with the main body grooves 116; the other two installation grooves 118 are respectively arranged at opposite ends of the second rib groove 115 and communicate with the second rib groove 115. A fixing groove 119 is also recessed on the top surface of the core 11. The fixing groove 119 is located inside the corner of the rib forming groove 110 and communicates with the main body groove 116, the extension groove 117 and the corresponding installation groove 118.

[0034] The lower mold 10 is provided with an ejection mechanism 20 for ejecting the product 200 formed on the core 11. The ejection mechanism 20 includes an ejector block 21 and an ejection driving member 23. The ejector block 21 is slidably installed in the installation groove 118. A first exhaust gap 24 communicating with the rib forming groove 110 is formed between the ejector block 21 and the lower mold 10. The ejection driving member 23 is installed on the lower mold 10 and connected to the ejector block 21.

[0035] In this embodiment, a plurality of top blocks 21 are provided, and the plurality of top blocks 21 are arranged at intervals along the length direction of the rib forming groove 110. Specifically, the number of the top blocks 21 is four, and the four top blocks 21 are respectively slidably embedded in the four mounting grooves 118. The first exhaust slit 24 communicates with the bottom of the rib forming groove 110. Specifically, the depth of the mounting groove 118 is greater than the depth of the rib forming groove 110. The mounting groove 118 includes a first groove wall 1181 and a second groove wall 1183 which are oppositely arranged. The second groove wall 1183 is closer to the rib forming groove 110 than the first groove wall 1181. The top of the second groove wall 1183 is connected to the bottom wall 111 of the rib forming groove 110. Thus, the slit between the top block 21 and the second groove wall 1183 forms the first exhaust slit 24 communicating with the bottom of the rib forming groove 110.

[0036] Please refer to Figure 8 simultaneously. In this embodiment, an insert block 30 is fixed in the fixing groove 119, and a second exhaust slit 31 communicating with the rib forming groove 110 is formed between the insert block 30 and the lower die 10. In this embodiment, the insert block 30 is connected to the lower die 10 by screws 34. Specifically, the lower die 10 is further provided with a plug hole 12 which communicates with the bottom of the fixing groove 119. The screw 34 passes through the plug hole 12 and extends into the fixing groove 119 to be threadedly connected to the bottom of the insert block 30. In this embodiment, the second exhaust slit 31 communicates with the bottom of the rib forming groove 110. Specifically, the depth of the fixing groove 119 is greater than the depth of the rib forming groove 110. The fixing groove 119 includes a first groove surface 1191 and a second groove surface 1193 which are oppositely arranged. The second groove surface 1193 is closer to the rib forming groove 110 than the first groove surface 1191. The top of the second groove surface 1193 is connected to the bottom wall 111 of the rib forming groove 110. Thus, the slit between the insert block 30 and the second groove surface 1193 forms the second exhaust slit 31 communicating with the bottom of the rib forming groove 110.

[0037] In this embodiment, an installation cavity 40 communicating with the outside is provided in the lower die 10. The first exhaust slit 24 and the second exhaust slit 31 both communicate with the bottom of the rib forming groove 110 and the installation cavity 40, so that the gas in the rib forming groove 110 can be better discharged during molding. Specifically, in this embodiment, the second exhaust slit 31 communicates with the installation cavity 40 through the plug hole 12.

[0038] To make the ejection movement of the top block 21 more stable, in this embodiment, guiding portions 60 are further provided on both the lower mold 10 and the insert block 30, and corresponding guiding portions 211 are provided on the top block 21. The guiding portion 211 and the guiding portion 60 are in sliding fit to guide the movement of the top block 21. The guiding portion 211 and the guiding portion 60 can be a rail and a guide groove structure used in cooperation, that is, one of the guiding portion 211 and the guiding portion 60 can be a rail, and the other is a guide groove structure used in cooperation, so as to guide the movement of the top block 21 and make the movement of the top block 21 more stable.

[0039] The ejection driving member 23 can drive the top block 21 to move up and down to eject the product 200 formed on the core 11. In this embodiment, the ejection driving member 23 is connected to a plurality of top blocks 21 through a connecting member 70 to drive the plurality of top blocks 21 to move synchronously. Specifically, the connecting member 70 can be a connecting plate, which is slidably received in the installation cavity 40, and the connecting member 70 is fixedly connected to the bottoms of the plurality of top blocks 21; the ejection driving member 23 is installed on the lower mold 10 and connected to the connecting member 70. It can be understood that in other embodiments, each top block 21 can also be connected to an ejection driving member 23, and the corresponding top block 21 is driven to move by the ejection driving member 23. The ejection driving member 23 can adopt a hydraulic cylinder or the like in the prior art, and its structure belongs to the prior art. For the sake of brevity, it will not be described in detail here.

[0040] A cavity (not shown in the figure) is provided on the upper mold 80. The structure of the upper mold 80 in this embodiment belongs to the prior art. For the sake of brevity, it will not be described in detail here.

[0041] During use, plastic raw materials are added into the cavity, and the upper and lower molds are closed. Under the action of heating and pressure, the plastic raw materials become a flowing state and fill the cavity to form the body 210 of the product 200. Part of the plastic raw materials enter the rib forming groove 110 to form ribs 230 on the surface of the body 210. During this process, the gas in the rib forming groove 110 can be discharged from the rib forming groove 110 through the first exhaust slit 24 and the second exhaust slit 31, so as to facilitate the entry of the raw materials into the rib forming groove 110; after the plastic raw materials are chemically cross-linked or physically cooled to harden and shape the product, the mold is opened, and then the ejection driving member 23 drives the top block 21 to move upward, and further ejects the product 200 from the core 11 to complete demolding.

[0042] The above-mentioned SMC compression mold 100 applicable to the forming of ultra-high rib strips of SMC products uses the ejector block 21 to eject the product 200. Compared with the ejector pins in the prior art, the contact area between the ejector block 21 and the product 200 is larger, and the force received by the product 200 can be dispersed, thereby effectively avoiding damaging or cracking the product 200 by ejection. At the same time, since the ejector block 21 is movable, a gap reserved between it and the lower mold 10 forms a first exhaust gap 24 communicating with the rib forming groove 110. During the forming process of the product 200, the gas in the rib forming groove 110 can be discharged through the first exhaust gap 24, which is conducive to the material flowing into the rib forming groove 110, effectively solving the problem that the ultra-high rib strip cannot be completely formed in actual production due to the large height of the rib 230.

[0043] For the above-mentioned SMC compression mold 100 applicable to the forming of ultra-high rib strips of SMC products, when the rib forming groove 110 has a corner, an insert block 30 is further provided inside the corner. The gap reserved between the insert block 30 and the lower mold 10 forms a second exhaust gap 31, which is more conducive to the discharge of the gas in the rib forming groove 110 and the inflow of the material into the rib forming groove 110, enabling the ultra-high rib strip to be completely formed when the rib forming groove 110 has a corner.

[0044] It can be understood that the shape of the core 11, the shape and quantity of the rib forming grooves 110 are not limited to this embodiment, and can be adjusted according to the shape of the product 200, the quantity of the ribs 230, etc.

[0045] It can be understood that the quantity of the ejector blocks 21, the quantity of the insert blocks 30, etc. can be set to other numbers according to the length and shape of the ribs 230, etc. Or in other embodiments, when the rib 230 is a linear structure, the insert block 30 can also be omitted.

[0046] The above description is a detailed description of the preferred and feasible embodiment of the present invention, but the embodiment is not used to limit the scope of the patent application of the present invention. Any equivalent changes or modifications completed under the technical spirit disclosed by the present invention shall fall within the scope of the patent covered by the present invention.

Claims

1. An SMC compression mold applicable to the forming of ultra-high rib strips for SMC products, including a lower mold (10), characterized in that: The lower mold (10) is provided with a core (11). On the top surface of the core (11), a rib forming groove (110) and a mounting groove (118) are recessed. The rib forming groove (110) is surrounded by a bottom wall (111), a first side wall (112) and a second side wall (113). The first side wall (112) and the second side wall (113) are respectively connected to opposite sides of the bottom wall (111) along the width direction of the rib forming groove (110). One side of the mounting groove (118) penetrates at least part of the first side wall (112) to communicate with the rib forming groove (110). A ejecting mechanism (20) for ejecting the product (200) formed on the core (11) is provided on the lower mold (10). The ejecting mechanism (20) includes an ejecting block (21) and an ejecting driving member (23). The ejecting block (21) is slidably installed in the mounting groove (118). A first exhaust gap (24) communicating with the rib forming groove (110) is formed between the ejecting block (21) and the lower mold (10). The ejecting driving member (23) is installed on the lower mold (10) and connected to the ejecting block (21).

2. The SMC compression mold applicable to the forming of ultra-high rib strips for SMC products according to claim 1, wherein: The depth of the mounting groove (118) is greater than the depth of the rib forming groove (110), so that the first exhaust gap (24) communicates with the bottom of the rib forming groove (110).

3. The SMC compression mold applicable to the forming of ultra-high rib strips for SMC products as described in claim 2, wherein: The mounting groove (118) includes a first groove wall (1181) and a second groove wall (1183) which are oppositely arranged. The second groove wall (1183) is closer to the rib forming groove (110) than the first groove wall (1181). The top of the second groove wall (1183) is connected to the bottom wall (111) of the rib forming groove (110). The gap between the ejecting block (21) and the second groove wall (1183) constitutes the first exhaust gap (24).

4. The SMC compression mold applicable to the formation of super-high rib strips for SMC products as described in claim 1, characterized in that: The rib (230) bends and extends to form a corner. A fixing groove (119) is further recessed on the top surface of the core (11). The fixing groove (119) is located inside the corner. An insert block (30) is fixed in the fixing groove (119). A second exhaust gap (31) communicating with the rib forming groove (110) is formed between the insert block (30) and the lower mold (10).

5. The SMC compression mold applicable to the forming of ultra-high rib strips for SMC products according to claim 4, characterized in that: The depth of the fixing groove (119) is greater than the depth of the rib forming groove (110), so that the second exhaust gap (31) communicates with the bottom of the rib forming groove (110).

6. The SMC compression mold applicable to the forming of ultra-high rib strips for SMC products as described in claim 5, characterized in that: The fixing groove (119) includes a first groove surface (1191) and a second groove surface (1193) which are oppositely arranged. The second groove surface (1193) is closer to the rib forming groove (110) than the first groove surface (1191). The top of the second groove surface (1193) is connected to the bottom wall (111) of the rib forming groove (110). The gap between the ejecting block (21) and the second groove surface (1193) constitutes the second exhaust gap (31).

7. The SMC compression mold applicable to the forming of ultra-high rib strips for SMC products as described in claim 4, wherein: An installation cavity (40) communicating with the outside is provided in the lower die (10), and both the first exhaust slit (24) and the second exhaust slit (31) communicate the bottom of the rib forming groove (110) and the installation cavity (40).

8. The SMC compression mold applicable to the forming of ultra-high rib strips for SMC products according to claim 7, characterized in that: The insert block (30) is connected to the lower die (10) by screws (34). The lower die (10) is further provided with a plug hole (12) that communicates the installation cavity (40) and the bottom of the fixing groove (119). The screws (34) pass through the plug hole (12) and are threadedly connected to the bottom of the insert block (30). The second exhaust slit (31) communicates with the installation cavity (40) through the plug hole (12).

9. The SMC compression mold applicable to the forming of ultra-high rib strips for SMC products as described in claim 7, characterized in that: The ejecting driving member (23) is connected to a plurality of the ejecting blocks (21) through a connecting member (70) to drive the plurality of the ejecting blocks (21) to move synchronously, and the connecting member (70) is slidably received in the installation cavity (40).

10. The SMC compression mold applicable to the forming of ultra-high rib strips for SMC products according to claim 1, wherein: The lower die (10) is provided with a guiding portion (60), and the ejecting block (21) is provided with a guiding portion (211). The guiding portion (211) is slidably engaged with the guiding portion (60) to guide the movement of the ejecting block (21).

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