Forming die for manufacturing palm part

Abstract

The forming die for manufacturing the palm part comprises an upper die body and a lower die body, the upper die body comprises an upper die base, an upper die base plate, an upper die plate and an upper die pressing plate which are sequentially arranged, an upper die cavity is formed in the lower surface of the upper die plate, and the upper die pressing plate surrounds the upper die plate; an upper die pressing spring connected with the upper die pressing plate is arranged in the upper die base plate, two finger and heel forming parts are arranged in the upper die plate, and the two finger and heel forming parts stretch into the upper die cavity and are located at the positions of two finger seams in the middle. The lower die comprises a lower die base, a lower die plate and a lower die pressing plate which are sequentially arranged, a lower die cavity is formed in the upper surface of the lower die plate and matched with the upper die cavity, the lower die pressing plate is arranged outside the lower die plate in a surrounding mode and opposite to the upper die pressing plate, and a driving part used for driving the lower die pressing plate to ascend and descend is arranged on the lower die base. According to the method, the cracking condition in the stretching forming process is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of molding dies, and in particular to a molding die for making a palm. Background Art

[0002] At present, stainless steel products have stable dimensional accuracy, good thermal conductivity, corrosion resistance, and the plates can be made in various thicknesses. These characteristics just meet the production requirements of latex, silicone, PVC, nitrile and other products. That is, large-scale production, low processing cost, high production efficiency, lightness, high rigidity and high thermal conductivity, corrosion resistance, high temperature resistance and oxidation resistance, so stainless steel metal hand molds are gradually used in glove production.

[0003] The stainless steel metal hand mold is divided into the palm part, the wrist part and the base part. The wrist part is the middle part connecting the palm part and the base part. The wrist part and the palm part are connected by welding, and the base part and the wrist part are connected by welding. When making the palm part, the metal sheet needs to be stretched into a blank left half palm and a blank right half palm, and the blank left half palm and the blank right half palm are trimmed along the contour to obtain the left half palm and the right half palm, and then the left half palm and the right half palm are welded together to form the palm part.

[0004] With respect to the above-mentioned related technologies, the inventors found that when a metal sheet is stretched to form a left half palm or a right half palm of a blank, due to the large deformation at the connection between the fingers and between the fingers and the palm, that is, the finger gaps of the palm, it is very easy for stretch cracking to occur in this area during forming, so there is room for certain improvements. Utility Model Content

[0005] In order to reduce the occurrence of cracking during the stretch forming process, the present application provides a forming mold for making a palm.

[0006] The present application provides a molding die for making a palm part using the following technical solution:

[0007] A forming mold for making a palm, comprising an upper mold and a lower mold, wherein the upper mold comprises an upper mold base, an upper mold pad, an upper mold plate and an upper mold pressing plate arranged in sequence, an upper mold cavity is arranged on the lower surface of the upper mold plate, the upper mold pressing plate surrounds the outer surface of the upper mold plate, an upper mold pressing spring connected to the upper mold pressing plate is arranged in the upper mold pad, and two finger heel forming parts are arranged in the upper mold plate, and the two finger heel forming parts extend into the upper mold cavity and are located at two middle finger gaps;

[0008] The lower mold includes a lower mold base, a lower mold plate and a lower mold pressing plate which are arranged in sequence. The upper surface of the lower mold plate is provided with a lower mold cavity, and the lower mold cavity cooperates with the upper mold cavity. The lower mold pressing plate is arranged around the outside of the lower mold plate and is opposite to the upper mold pressing plate. The lower mold base is provided with a driving part for driving the lower mold pressing plate to rise and fall.

[0009] Preferably, the finger heel forming part includes a finger heel mounting groove arranged in the upper mold plate, and a finger heel forming block arranged in the finger heel mounting groove, the finger heel mounting groove is communicated with the upper mold cavity, the finger heel forming block extends into the upper mold cavity, and a finger heel nitrogen spring connected to the finger heel forming block is arranged in the upper mold pad.

[0010] Preferably, hanging ends are provided on both sides of the finger-heel forming block, and hanging shoulders for cooperating with the hanging ends are provided on both side groove walls of the finger-heel mounting groove.

[0011] Preferably, the lower surface of the finger heel forming block has a V-shaped forming end, and the lower surface of the finger heel forming block forms a first forming surface and a second forming surface on both sides of the V-shaped forming end, and the V-shaped forming end of the finger heel forming block is used to form the base of the finger gaps on the palm.

[0012] Preferably, a finger heel limiting block is provided in the finger heel installation groove, and the lower surface of the finger heel limiting block has a limiting inclined surface, and the limiting inclined surface is used to abut against the upper surface of the finger heel forming block when the finger heel forming block is pressed into the finger heel installation groove;

[0013] When the finger heel forming block is not under pressure, the upper surface of the finger heel forming block is horizontal. After the finger heel forming block is pressed into the finger heel mounting groove, the upper surface of the finger heel forming block abuts against the limiting inclined surface of the finger heel limiting block, and the second forming surface of the finger heel forming block is horizontal.

[0014] Preferably, the driving part includes a fixed plate arranged on the lower die base, and a push rod slidably mounted on the fixed plate, the push rod is connected to the lower die pressing plate, and a driving hydraulic cylinder is arranged on the fixed plate.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] The present application adopts the order of forming the two middle finger gaps and the two finger gaps on the sides. The two middle finger gaps are formed first to make full use of the preformed material to compensate the material of the two middle finger gaps. At the same time, since the two finger gaps on the sides have not yet been formed, the resistance to the inward flow of the materials on both sides is reduced, and the material flow to the two middle finger gaps is fully guaranteed, which overcomes the problem that when all the finger gaps are formed at the same time, the two middle finger gaps have no material flow compensation, resulting in the material in this area relying only on its own material to extend and form, causing the risk of material thinning and cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a first structural schematic diagram of the molding die.

[0018] Figure 2 It is a second structural schematic diagram of the molding die.

[0019] Figure 3 It refers to the schematic diagram of the stretching position of the forming block.

[0020] Figure 4 It is a schematic diagram of the first stretching state of the forming die.

[0021] Figure 5 It is a schematic diagram of the second stretching state of the forming die.

[0022] Figure 6 It is a schematic diagram of the third stretching state of the forming die.

[0023] Figure 7 It is a schematic diagram of the fourth stretching state of the forming die.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. upper mold; 11. upper mold base; 12. upper mold pad; 13. upper mold plate; 14. upper mold pressing plate; 15. upper mold pressing spring; 16. upper mold cavity; 17. finger heel forming part; 171. finger heel mounting groove; 172. finger heel forming block; 173. finger heel nitrogen spring; 174. hanging end; 175. hanging shoulder; 176. V-shaped forming end; 177. first forming surface; 178. second forming surface; 18. finger heel limiting block; 19. limiting slope; 2. lower mold; 21. lower mold base; 22. lower mold plate; 23. lower mold pressing plate; 24. lower mold cavity; 25. driving part; 251. fixing plate; 252. ejector rod. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-7 This application is described in further detail.

[0026] A forming die for making a palm part, used for stretching a preformed sheet into a blank left palm or a blank right palm of the palm part, the preformed sheet is a stainless steel metal plate, and then the blank left palm and the blank right palm are trimmed along the contour to obtain the left palm and the right palm, and then the left palm and the right palm are welded together to form the palm part;

[0027] Reference Figure 1 and Figure 2 As shown, the molding die includes an upper die 1 and a lower die 2 , and the upper die 1 is used in conjunction with the lower die 2 .

[0028] The upper mold 1 includes an upper mold base 11, an upper mold pad 12, an upper mold plate 13 and an upper mold pressing plate 14 which are arranged in sequence. The upper mold pressing plate 14 is arranged on the lower surface of the upper mold plate 13, and the upper mold pressing plate 14 surrounds the upper mold plate 13. An upper mold pressing spring 15 is arranged in the upper mold pad 12, one end of the upper mold pressing spring 15 is fixed on the upper mold pad 12, and the other end of the upper mold pressing spring 15 passes through the upper mold plate 13 and is connected to the upper mold pressing plate 14.

[0029] An upper mold cavity 16 is provided on the lower surface of the upper mold template 13. The shape of the upper mold cavity 16 is the contour shape of the palm for forward stretching and molding of the preformed sheet, wherein the middle two finger gaps in the upper mold cavity 16 are vacant, and two finger heel molding parts 17 are provided in the upper mold template 13. The two finger heel molding parts 17 extend into the upper mold cavity 16 and are located at the middle two finger gaps. The two finger heel molding parts 17 are used to mold the two middle finger gaps.

[0030] Reference Figure 2 , Figure 3 and Figure 4 As shown, the finger heel forming part 17 includes a finger heel mounting groove 171 arranged in the upper mold plate 13, and a finger heel forming block 172 arranged in the finger heel mounting groove 171, the finger heel mounting groove 171 is communicated with the upper mold cavity 16, the finger heel forming block 172 extends into the upper mold cavity 16, and a finger heel nitrogen spring 173 connected to the finger heel forming block 172 is arranged in the upper mold pad 12, one end of the finger heel nitrogen spring 173 is connected to the upper mold pad 12, and the other end of the finger heel nitrogen spring 173 is in contact with the upper surface of the finger heel forming block 172.

[0031] The finger heel forming block 172 has hanging ends 174 on both sides, and the groove walls on both sides of the finger heel mounting groove 171 are provided with hanging shoulders 175 for cooperating with the hanging ends 174. In the natural state (that is, the finger heel forming block 172 is not under pressure), the finger heel forming block 172 cooperates with the hanging shoulders 175 through the hanging ends 174, so that the lower surface of the finger heel forming block 172 extends into the upper mold cavity 16, and the upper surface of the finger heel forming block 172 is horizontal.

[0032] The lower surface of the finger heel forming block 172 has a V-shaped forming end 176, and the lower surface of the finger heel forming block 172 forms a first forming surface 177 and a second forming surface 178 on both sides of the V-shaped forming end 176. The V-shaped forming end 176 of the finger heel forming block 172 is used to form the base of the finger gaps on the palm.

[0033] Among them, a finger heel stop block 18 is arranged in the finger heel installation groove 171, and the lower surface of the finger heel stop block 18 has a stop bevel 19, and the stop bevel 19 is used to abut against the upper surface of the finger heel forming block 172 when the finger heel forming block 172 is pressed into the finger heel installation groove 171. After the finger heel forming block 172 is pressed into the finger heel installation groove 171, the upper surface of the finger heel forming block 172 is inclined, and the second forming surface 178 will be horizontal. It is worth noting that in order to realize the above-mentioned state transition of the finger heel forming block 172, the right wall surface of the finger heel forming block 172 is inclined, and the upper surface of the hanging shoulder 175 on the right side of the finger heel installation groove 171 is inclined, and the inclination direction is the same as the inclination direction of the stop bevel 19.

[0034] It is worth noting that when the finger-heel forming block 172 is not under pressure, the lower surface of the upper mold pressing plate 14 is lower than the lowest point of the lower surface of the finger-heel forming block 172, the lowest point of the lower surface of the finger-heel forming block 172 is lower than the lower surface of the upper template 13, and the lower surface of the finger-heel forming block 172 is lower than the two finger gaps on both sides of the upper mold cavity 16. Therefore, when the upper mold 1 is pressed downward as a whole, it contacts the preformed sheet in the order of the upper mold pressing plate 14, the finger-heel forming block 172, and the upper template 13.

[0035] Reference Figure 1 and Figure 2 As shown, the lower mold 2 includes a lower mold base 21, a lower mold plate 22 and a lower mold pressing plate 23 which are arranged in sequence. The upper surface of the lower mold plate 22 is provided with a lower mold cavity 24, and the lower mold cavity 24 cooperates with the upper mold cavity 16. After the upper mold cavity 16 and the lower mold cavity 24 are molded together, the preformed sheet is stretched and formed into the left half of the palm blank or the right half of the palm blank.

[0036] The lower die pressing plate 23 is arranged around the lower mold plate 22 and opposite to the upper die pressing plate 14. The lower die base 21 is provided with a driving unit 25 for driving the lower die pressing plate 23 to rise and fall. In one embodiment, the driving unit 25 includes a fixed plate 251 provided on the lower die base 21, and a push rod 252 slidably mounted on the fixed plate 251, the push rod 252 is connected to the lower die pressing plate 23, and a driving hydraulic cylinder is provided on the fixed plate 251.

[0037] The upper surface height of the lower die pressing plate 23 is higher than the upper surface height of the lower mold plate 22 , and the lower die pressing plate 23 will contact the upper die pressing plate 14 before the lower mold plate 22 .

[0038] It is worth noting that the demoulding force of the lower mold pressing plate 23 mentioned above>the spring force of the nitrogen spring 173>the pressing force of the upper mold pressing plate 14.

[0039] The following is an explanation of the stretching process of the preformed sheet by the upper mold 1 and the lower mold 2.

[0040] Reference Figure 4 As shown, the preformed sheet is first placed on the lower mold pressing plate 23. At this time, the upper mold 1 moves downward as a whole, and the upper mold pressing plate 14 contacts and presses the preformed sheet to press the preformed sheet with the lower mold pressing plate 23. Among them, the demoulding force of the lower mold pressing plate 23 is greater than the pressing force of the upper mold pressing plate 14. The upper mold 1 continues to move downward, and the upper mold pressing plate 14 no longer moves downward. The finger-heel forming block 172 first contacts the preformed sheet, and the upper mold 1 and the finger-heel forming block 172 continue to move downward. The upper mold pressing plate 14 no longer moves downward due to the action of the lower mold pressing plate 23.

[0041] Reference Figure 5 As shown, the finger heel forming block 172 moves downward to stretch the two middle finger gaps. Since the preformed sheet is pressed, the material will flow to the two middle finger gaps when the finger heel forming block 172 is formed. The finger heel forming block 172 first stretches the base of the two middle finger gaps because the deformation of the material at the base of the two middle finger gaps is the largest, so more material needs to flow to this position.

[0042] Reference Figure 6 As shown, after the finger heel forming block 172 is formed to a certain depth, the upper mold pressing plate 14 is fitted with the upper template 13, and the upper template 13 will contact the preformed sheet. Subsequently, the upper template 13, the finger heel forming block 172, and the upper mold pressing plate 14 will press the lower mold pressing plate 23 to move downward.

[0043] As the upper template 13, the finger-heel forming block 172, and the upper mold pressing plate 14 move downward together, the upper template 13 contacts the lower template 22, the upper mold cavity 16 and the lower mold cavity 24 begin to be assembled, the preformed sheet begins to be stretched and formed as a whole, and the two finger gaps on both sides begin to be stretched and formed at this stage.

[0044] Reference Figure 7 As shown, when the lowest point of the finger heel forming block 172 contacts the bottom surface of the lower mold cavity 24, the finger heel forming block 172 receives a reaction force and stops moving. At this time, as the upper mold 1 continues to move downward as a whole, the finger heel nitrogen spring 173 is compressed and contracted, and at the same time, the force on the left side of the finger heel forming block 172 is unbalanced, and then it rotates to the right.

[0045] Finally, the lower surface of the finger heel forming block 172 is rotated from a V shape to a straight shape, and the right side of the finger heel forming block 172 is spliced ​​with the lower surface of the upper mold 1 on a plane. When the upper mold 1 and the lower mold 2 are completely closed, the finger heel forming block 172 is restricted by the finger heel limit block 18 and exerts pressure on the preformed sheet together with the upper mold 1, finally achieving stretching forming of the preformed sheet.

[0046] The present application adopts the order of forming the two middle finger gaps and the two finger gaps on the sides. The two middle finger gaps are formed first to make full use of the preformed material to compensate the material of the two middle finger gaps. At the same time, since the two finger gaps on the sides have not yet been formed, the resistance to the inward flow of the materials on both sides is reduced, and the material flow to the two middle finger gaps is fully guaranteed, which overcomes the problem that when all the finger gaps are formed at the same time, the two middle finger gaps have no material flow compensation, resulting in the material in this area relying only on its own material to extend and form, causing the risk of material thinning and cracking.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A forming mold for making a palm, comprising an upper mold (1) and a lower mold (2), characterized in that: The upper mold (1) comprises an upper mold base (11), an upper mold pad (12), an upper mold plate (13) and an upper mold pressing plate (14) which are arranged in sequence; an upper mold cavity (16) is arranged on the lower surface of the upper mold plate (13); the upper mold pressing plate (14) surrounds the upper mold plate (13); an upper mold pressing spring (15) connected to the upper mold pressing plate (14) is arranged in the upper mold pad (12); two finger heel forming parts (17) are arranged in the upper mold plate (13); the two finger heel forming parts (17) extend into the upper mold cavity (16) and are located at two middle finger gaps; The lower mold (2) comprises a lower mold base (21), a lower mold plate (22) and a lower mold pressing plate (23) which are arranged in sequence; a lower mold cavity (24) is arranged on the upper surface of the lower mold plate (22); the lower mold cavity (24) cooperates with the upper mold cavity (16); the lower mold pressing plate (23) is arranged around the outside of the lower mold plate (22) and is opposite to the upper mold pressing plate (14); and a driving part (25) for driving the lower mold pressing plate (23) to rise and fall is arranged on the lower mold base (21).

2. A forming mold for making a palm according to claim 1, characterized in that: The finger-heel forming part (17) comprises a finger-heel mounting groove (171) arranged in the upper mold plate (13), and a finger-heel forming block (172) arranged in the finger-heel mounting groove (171); the finger-heel mounting groove (171) is communicated with the upper mold cavity (16); the finger-heel forming block (172) extends into the upper mold cavity (16); and a finger-heel nitrogen spring (173) connected to the finger-heel forming block (172) is arranged in the upper mold pad (12).

3. A forming mold for making a palm according to claim 2, characterized in that: The finger heel forming block (172) is provided with hanging ends (174) on both sides, and the groove walls on both sides of the finger heel mounting groove (171) are provided with hanging shoulders (175) for cooperating with the hanging ends (174).

4. A forming mold for making a palm according to claim 2, characterized in that: The lower surface of the finger heel forming block (172) has a V-shaped forming end (176), and the lower surface of the finger heel forming block (172) forms a first forming surface (177) and a second forming surface (178) on both sides of the V-shaped forming end (176). The V-shaped forming end (176) of the finger heel forming block (172) is used to form the base of the finger joints on the palm.

5. A forming mold for making a palm according to claim 2, characterized in that: A finger heel limiting block (18) is arranged in the finger heel installation groove (171), and the lower surface of the finger heel limiting block (18) has a limiting inclined surface (19), and the limiting inclined surface (19) is used to abut against the upper surface of the finger heel forming block (172) when the finger heel forming block (172) is pressed into the finger heel installation groove (171); When the finger heel forming block (172) is not under pressure, the upper surface of the finger heel forming block (172) is horizontal; after the finger heel forming block (172) is pressed into the finger heel mounting groove (171), the upper surface of the finger heel forming block (172) abuts against the limiting inclined surface (19) of the finger heel limiting block (18), and the second forming surface (178) of the finger heel forming block (172) is horizontal.

6. A forming mold for making a palm according to claim 1, characterized in that: The driving unit (25) It comprises a fixing plate (251) arranged on a lower die base (21), and a push rod (252) slidably mounted on the fixing plate (251). The push rod (252) is connected to the lower die pressing plate (23), and a driving hydraulic cylinder is arranged on the fixed plate (251).

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