Mold and slide block thereof

Abstract

A slide block comprises a body, a block core and a fastener. The body comprises an angular hole formed on a first body surface thereof. The block core is detachably fixed on the body. The block core comprises a first core surface and a mold pattern, and the mold pattern is formed on the first core surface. The fastener detachably connects the block core to the body.

Description

BACKGROUND

The invention relates to a slide block, and more particularly to an easily maintained slide block utilized in molding.

When a workpiece (such as a housing of a cellular phone or a notebook) comprising a protrusion or a recess (under cut portions) is formed by injection molding, it cannot be directly disassembled from an integrally formed mold. The mold thus comprises a slide block for disassembly from the under cut portions.

FIG. 1a shows a conventional mold comprising a slide block 10. A workpiece 40 is formed by the slide block 10, a first mold structure (cavity) 20 and a second mold structure 30. The first mold structure 20 and an angular pin 15 are fixed on a base 21. The angular pin 15 is inserted into the slide block 10 from the base 21. A mold pattern 14 is formed on a front surface 11 of the slide block 10. A pattern is formed on the workpiece 40 by the mold pattern 14. With reference to FIG. 1b, after the workpiece 40 is formed, the first mold structure 20 and the base 21 are disassembled from the workpiece 40 in a first direction y (vertical direction), and the angular pin 15 pushes the slide block 10 disassembled from the workpiece 40 in a second direction x (horizontal direction). Thus, the workpiece 40 can be smoothly disassembled from the mold. With reference to FIG. 1c, the slide block 10 slides on a wear plate 13. Locking blocks 12 are disposed on the two sides of the slide block 10. The locking blocks 12 restrict movement of the slide block 10 in the second direction x.

The slide block 10 requires wear-resistant property, and the mold pattern 14 requires high-rigidity property. The mold pattern 14, however, is integrally formed on the front surface 11 of the slide block 10. Few materials satisfy both wear-resistance and high-rigidity requirements. The slide block 10, thus, must sacrifice wear-resistant or high-rigidity, and, thus, have a shorter life-span. Additionally, when the mold pattern 14 is damaged, the slide block 10 must be completely replaced, and structures near the slide block 10 must be disassembled. Thus, the maintenance cost is higher and maintenance time is longer.

SUMMARY

A slide block comprises a body, a block core and a fastener. The body comprises an angular hole formed on a first body surface thereof. The block core is detachably fixed on the body. The block core comprises a first core surface and a mold pattern, and the mold pattern is formed on the first core surface. The fastener detachably connects the block core to the body.

When the mold pattern on the first core surface is damaged, the block core is replaced rather than the entire slide block. Thus, the maintenance cost is reduced. When a workpiece with new pattern is produced (formed), the mold pattern is altered by simply replacing the block core. The assembly and disassembly time of the mold is reduced. The block core is made of high-rigidity material and the body is made of wear-resistant material. The lifetime of the block core and the body is extended.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be more fully understood from the following detailed description and the accompanying drawings, given by the way of illustration only and thus not intended to limit the disclosure.

FIG. 1a shows a conventional mold comprising a slide block;

FIG. 1b shows the conventional slide block detached from a workpiece;

FIG. 1c shows the conventional slide block and nearby mold structures;

FIG. 2a is an exploded view of a slide block of the invention;

FIG. 2b is an assembly view of the slide block of the invention;

FIG. 3a is a side view of the slide block and mold structures nearby;

FIG. 3b shows the slide block of the invention detached from a workpiece;

FIG. 4 is a perspective view of the slide block and nearby mold structures;

FIG. 5a shows a modified embodiment of the invention; and

FIG. 5b shows another modified embodiment of the invention.

DETAILED DESCRIPTION

FIG. 2a is an exploded view of a slide block 100 of the invention, which comprises a body 110, a block core 120 and a fastener (bolt) 130. The body 110 comprises a first body surface 111 and an angular hole 115. The angular hole 115 is a through hole formed on the first body surface 111. The block core 120 comprises a mold pattern 125 formed on a first core surface 121 of the block core 120. With reference to FIG. 2b, the fastener 130 detachably fixes the block core 120 on the body 110. The fastener 130 is screwed into the block core 120 and the body 110 in a fixing direction a. The fixing direction a is perpendicular to a second core surface 122 of the block core 120. The second core surface 122 is perpendicular to the first core surface 121.

The block core 120 is detachably fixed on the body 110. When the mold pattern 125 on the first core surface 121 is damaged, the block core 120 is replaced rather than the whole slide block 100. Thus, the maintenance cost is reduced. When a workpiece with a new pattern is produced (formed), the mold pattern 125 is altered by simply replacing the block core 120. The mold assembly and disassembly time is reduced. The block core 120 is made of high-rigidity material and the body is made of wear-resistant material. The lifetime of the block core 120 and the body 110 is extended.

As shown in FIG. 3a, the workpiece 40 is formed by the slide block 100, the first mold structure 20, the base 21 and the second mold structure 30, wherein the slide block 100 is in a first position. A locking element 22 is disposed on the base 21 abutting the body 110 for preventing the slide block 100 from sliding in the molding. The angular pin 15 is inserted into the angular hole 115 of the body 110 from the base 21. As shown in FIG. 3b, after the workpiece 40 is formed, the first mold structure 20 and the base 21 are detached from the workpiece 40 upward in a first direction y (vertical direction). The angular pin 15, meanwhile, pushes the slide block 100 from the first position to a second position in a second direction (horizontal direction) to detach the slide block 100 from the workpiece 40.

With reference to FIG. 4, the slide block 100 slides on a wear plate 13. Locking blocks 12 are disposed on two sides of the slide block 100. The locking blocks 12 restricts the movement of the slide block 100 in the second direction x.

With reference to FIGS. 3b and 4, when the mold pattern 125 on the first core surface 121 is damaged, only the block core 120 is replaced rather than the entire slide block 100. The first mold structure 20 is disassembled from the base 21, and replaces the block core 120 in the first direction y without disassembling the mold structure (for example, locking blocks 12) nearing the slide block 100. The maintenance time is therefore shortened.

FIG. 5a shows a slide block 100′ of a modified embodiment of the invention, wherein the fastener 130 passes the body 110 through a second body surface (back surface) 112, and detachably fixes the body 110 on a third core surface 123 of the block core 120.

FIG. 5b shows a slide block 100″ of a modified embodiment of the invention, wherein the fastener 130 passes the block core 120 through the first core surface 121, and detachably fixes the block core 120 on a third body surface 113 of the body 110.

As shown in FIGS. 5a and 5b, the block core can be fixed on the body via various means. Additionally, the shape and location of the block core can also be modified.

While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation to encompass all such modifications and similar arrangements.

Claims

1. A slide block, comprising:

a body, comprising a protrusion;

a block core, detachably fixed on the body, wherein the block core comprises a first core surface, a recess and a mold pattern, the recess abuts the protrusion, and the mold pattern is formed on the first core surface; and

a fastener, detachably connecting the block core to the body.

2. The slide block as claimed in claim 1, wherein the body comprises an angular hole formed on a first body surface thereof.

3. The slide block as claimed in claim 1, wherein the body comprises an angular hole passing through the body.

4. (canceled)

5. The slide block as claimed in claim 1, wherein the fastener is a bolt.

6. The slide block as claimed in claim 5, wherein the fastener is fixed in the body and the block core in a fixing direction, and the fixing direction is perpendicular to a second core surface of the block core.

7. The slide block as claimed in claim 6, wherein the second core surface is perpendicular to the first core surface.

8. The slide block as claimed in claim 6, wherein the second core surface is an upper surface of the block core.

9. The slide block as claimed in claim 5, wherein the fastener is disposed on the first core surface, passing through the block core, and screwed into the body for connecting the block core and the body.

10. The slide block as claimed in claim 5, wherein the fastener is disposed on a second core surface perpendicular to the first core surface, passing through the block core, and screwed into the body for connecting the block core and the body.

11. A mold for forming a workpiece, comprising:

a body comprising a protrusion, movable between a first position and a second position;

a block core, detachably fixed on the body, wherein the block core comprises a first core surface, a recess and a mold pattern, the recess abuts the protrusion, and the mold pattern is formed on the first core surface;

a fastener, detachably connecting the block core to the body and

a first mold structure, wherein the workpiece is formed by the first mold structure and the first core surface.

12. The mold as claimed in claim 11, wherein when the mold is disassembled, the mold structure is detached from the workpiece in a first direction, and the block core is detached from the workpiece in a second direction.

13. The mold as claimed in claim 12, wherein the first direction is a perpendicular direction.

14. The mold as claimed in claim 12, wherein the block core is disassembled from the body in the first direction.

15. The mold as claimed in claim 12, wherein an angular hole is formed on the body.

16. The mold as claimed in claim 15, further comprising:

a base, connected to the first mold structure; and

an angular pin, disposed on the base and inserted into the angular hole.

17. The mold as claimed in claim 16, wherein when the mold is disassembled, the base and the angular pin are moved in the first direction with the first mold structure, and the angular pin pushes the body for detaching the block core from the workpiece in the second direction.

18. A slide block, comprising:

a body;

a block core, detachably fixed on the body, wherein the block core comprises a first core surface and a mold pattern, and the mold pattern is formed on the first core surface; and

a bolt, passing through the block core and detachably connecting the block core to the body.

19. A slide block, comprising:

a body;

a block core, detachably fixed on the body, wherein the block core comprises a first core surface and a mold pattern, and the mold pattern is formed on the first core surface; and

a bolt, passing through the body and detachably connecting the block core to the body.