Connecting structure of rack and core-pulling support
By introducing a T-shaped pressure block into the connection structure between the core-pulling bracket and the rack and pinion, the problem of easy pin breakage was solved, and a more reliable demolding process was achieved.
Patent Information
- Application Number
- CN202423030525.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-10
AI Technical Summary
In existing injection molds, when the core-pulling bracket drives the rack downward through the force transmitted by the pin, the pin is prone to breakage.
A T-shaped pressure block is introduced into the connection structure between the core-pulling bracket and the rack. The force is transmitted through the pin and the T-shaped pressure block, which shares the force on the pin and increases the number of force-bearing points.
It effectively avoids or reduces pin breakage, improving the demolding reliability of injection molds.
Smart Images
Figure CN223507600U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a connection structure between a rack and a core-pulling bracket. Background Technology
[0002] The core-pulling mechanism of injection molds often uses a core-pulling bracket and a rack. The core-pulling bracket is horizontally placed in the left-right direction. A vertical insertion hole for the top of the rack is opened in the middle of the horizontal direction of the bottom surface of the core-pulling bracket. The front and rear end faces of the core-pulling bracket are respectively provided with horizontal insertion holes for pins to pass through, and the horizontal insertion holes are connected to the vertical insertion holes. The rack is placed vertically, and a horizontal mounting hole for pins to pass through is opened at the top of the rack. The top of the rack is inserted into the vertical insertion hole on the bottom surface of the core-pulling bracket. The top of the rack is connected to the core-pulling bracket by a pin, and the pin passes through the horizontal insertion holes on the front and rear end faces of the core-pulling bracket and the horizontal mounting hole at the top of the rack.
[0003] When the injection mold is demolded, a downward force is applied to the core-pulling bracket. The core-pulling bracket drives the rack (which moves down with the core-pulling bracket) through the pin, and then the downward moving rack drives the core-pulling action. However, since the force applied by the core-pulling bracket to the rack is entirely transmitted through the pin, the pin often breaks easily. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this utility model provides a connection structure for a rack and a core-pulling bracket, comprising a core-pulling bracket and a rack; the core-pulling bracket is horizontally placed in the left-right direction, and a vertical insertion hole is provided on the bottom surface of the core-pulling bracket for the top of the rack to be inserted; the front and rear end faces of the core-pulling bracket are respectively provided with horizontal insertion holes for a pin to pass through, and the horizontal insertion holes are connected to the vertical insertion holes; the rack is vertically placed, and a horizontal mounting hole for a pin to pass through is provided on the top of the rack; the top of the rack is inserted into the vertical insertion hole on the bottom surface of the core-pulling bracket; the top of the rack is connected to the core-pulling bracket by a pin, and the pin passes through the horizontal insertion holes on the front and rear end faces of the core-pulling bracket and the horizontal mounting hole on the top of the rack;
[0005] The top surface of the core-pulling bracket has a horizontal mounting groove in the middle for installing T-shaped pressure blocks, and the top of the vertical insertion hole is connected to the horizontal mounting groove (the horizontal mounting groove is located above the horizontal insertion hole).
[0006] A T-shaped pressure block is installed in a horizontal mounting groove; the T-shaped pressure block includes: a horizontal block that is laid flat and fixed in the horizontal mounting groove, and a vertical block that is inserted into a vertical insertion hole, with its bottom end abutting against the top end of the rack and its top end fixed to the bottom surface of the horizontal block.
[0007] Preferably, the transverse block has vertical main mounting holes for installing main bolts at both transverse ends, and the transverse mounting groove bottom wall has main thread holes for installing main bolts at both transverse ends, with the vertical main mounting holes and main thread holes corresponding one-to-one; the transverse block is fixed to the transverse mounting groove by a pair of main bolts, which pass through the corresponding vertical main mounting holes and are locked into the corresponding main thread holes.
[0008] Preferably, the transverse block is further provided with a vertical fine mounting hole for installing a fine bolt, and the top of the vertical block is provided with a fine threaded hole for installing a fine bolt; the transverse block is fixed to the vertical block by a fine bolt, the fine bolt passing through the fine mounting hole and locking into the fine threaded hole.
[0009] Preferably, the pin is clearance-fitted with the transverse insertion hole.
[0010] Preferably, the vertical insertion hole is a square hole.
[0011] Preferably, the vertical insertion hole is located in the middle of the horizontal direction of the bottom surface of the core-pulling bracket.
[0012] Preferably, the top of the vertical insertion hole is connected to the middle of the horizontal mounting groove.
[0013] Preferably, the fine mounting hole is located in the middle of the transverse block.
[0014] The advantages and beneficial effects of this utility model are as follows: it provides a connection structure between a rack and a core-pulling bracket, which increases the force on the pressure block in the direction of demolding force, thus avoiding or greatly reducing the problem of easy breakage of the pin.
[0015] When the injection mold is demolded, a downward force is applied to the core-pulling bracket. The core-pulling bracket drives the rack (which moves down with the core-pulling bracket) through the pin and T-shaped pressure block, and then the downward moving rack drives the core-pulling action. Since the force applied by the core-pulling bracket to the rack is transmitted not only through the pin, but also through the T-shaped pressure block (horizontal block + vertical block), the T-shaped pressure block can share the force of the pin, thus avoiding or greatly reducing the problem of easy pin breakage. Attached Figure Description
[0016] Figure 1 This is an overall schematic diagram of the present invention;
[0017] Figure 2 This is a schematic diagram of the top surface of the core-pulling bracket;
[0018] Figure 3 This is a schematic diagram of the bottom surface of the core-pulling bracket;
[0019] Figure 4 This is a schematic diagram of a T-shaped pressure block and a rack;
[0020] Figure 5 This is a schematic diagram of the top of the vertical block. Detailed Implementation
[0021] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.
[0022] The specific technical solution of this utility model is as follows:
[0023] like Figures 1 to 5 As shown, a connection structure between a rack 2 and a core-pulling bracket 1 includes a core-pulling bracket 1 and a rack 2. The core-pulling bracket 1 is placed horizontally in the left-right direction. A vertical insertion hole 11 for inserting the top of the rack 2 is opened in the middle of the horizontal direction of the bottom surface of the core-pulling bracket 1. The front and rear end faces of the core-pulling bracket 1 are respectively provided with horizontal insertion holes 12 for pins to pass through, and the horizontal insertion holes 12 are connected to the vertical insertion holes 11. The rack 2 is placed vertically. A horizontal mounting hole 21 for pins to pass through is opened in the top of the rack 2. The top of the rack 2 is inserted into the vertical insertion hole 11 on the bottom surface of the core-pulling bracket 1. The top of the rack 2 is connected to the core-pulling bracket 1 by a pin, and the pin passes through the horizontal insertion holes 12 on the front and rear end faces of the core-pulling bracket 1 and the horizontal mounting hole 21 in the top of the rack 2 (the pin is not shown in any of the figures).
[0024] The pin is clearance-fitted with the horizontal insertion hole 12; the vertical insertion hole 11 is a square hole;
[0025] The top surface of the core-pulling bracket 1 has a horizontal mounting groove 13 for installing the T-shaped pressure block 3 in the middle of the horizontal direction, and the top of the vertical insertion hole 11 is connected to the middle of the horizontal mounting groove 13 (the horizontal mounting groove 13 is located above the horizontal insertion hole 12).
[0026] A T-shaped pressure block 3 is installed in a horizontal mounting groove 13; the T-shaped pressure block 3 includes: a horizontal block 31 that is laid flat and fixed in the horizontal mounting groove 13, and a vertical block 32 that is inserted into a vertical insertion hole 11, with its bottom end abutting against the top end of the rack 2 and its top end fixed to the bottom surface of the horizontal block 31.
[0027] The transverse block 31 has vertical main mounting holes 41 for installing main bolts at both ends of its transverse side, and main threaded holes 42 for installing main bolts at both ends of the bottom wall of the transverse mounting groove 13. The vertical main mounting holes 41 and the main threaded holes 42 correspond one-to-one. The transverse block 31 is fixed to the transverse mounting groove 13 by a pair of main bolts. The pair of main bolts pass through the corresponding vertical main mounting holes 41 and are locked into the corresponding main threaded holes 42 (the main bolts are not shown in any of the figures).
[0028] The transverse block 31 is provided with a vertical fine mounting hole 43 for installing fine bolts in the transverse middle part, and the top of the vertical block 32 is provided with a fine screw hole 44 for installing fine bolts; the transverse block 31 is fixed to the vertical block 32 by fine bolts, and the fine bolts pass through the fine mounting hole 43 and are locked into the fine screw hole 44 (fine bolts are not shown in any of the figures).
[0029] When the injection mold is demolded, a downward force is applied to the core-pulling bracket 1. The core-pulling bracket 1 drives the rack 2 (which moves downward with the core-pulling bracket 1) through the pin and the T-shaped pressure block 3, and then drives the core-pulling action through the downward moving rack 2. Since the force applied by the core-pulling bracket 1 to the rack 2 is not only transmitted through the pin, but also through the T-shaped pressure block 3 (horizontal block 31 + vertical block 32), the T-shaped pressure block 3 can share the force of the pin, so the problem of easy pin breakage can be avoided or greatly reduced.
[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A connection structure between a rack and a core-pulling bracket, comprising a core-pulling bracket and a rack; the bottom surface of the core-pulling bracket has a vertical insertion hole, and the front and rear end faces of the core-pulling bracket respectively have horizontal insertion holes, which communicate with the vertical insertion hole; the rack is vertically positioned, and a horizontal mounting hole is formed at the top of the rack; the top of the rack is inserted into the vertical insertion hole; the top of the rack is connected to the core-pulling bracket by a pin, and the pin passes through the horizontal insertion holes at the front and rear end faces of the core-pulling bracket and the horizontal mounting hole at the top of the rack; characterized in that... The top surface of the core-pulling bracket has a horizontal mounting groove for installing a T-shaped pressure block in the middle, and the top of the vertical insertion hole is connected to the horizontal mounting groove; a T-shaped pressure block is installed in the horizontal mounting groove; the T-shaped pressure block includes: a horizontal block that is laid flat and fixed in the horizontal mounting groove, and a vertical block that is inserted into the vertical insertion hole, with its bottom end abutting against the top of the rack and its top end fixed to the bottom surface of the horizontal block.
2. The connection structure between the rack and the core-pulling bracket according to claim 1, characterized in that, The transverse block has vertical main mounting holes for installing main bolts at both ends of its transverse side, and main threaded holes for installing main bolts at both ends of the transverse side of the bottom wall of the transverse mounting groove. The vertical main mounting holes and main threaded holes correspond one-to-one. The transverse block is fixed to the transverse mounting groove by a pair of main bolts, which pass through the corresponding vertical main mounting holes and are locked into the corresponding main threaded holes.
3. The connection structure between the rack and the core-pulling bracket according to claim 1, characterized in that, The transverse block is also provided with a vertical fine mounting hole for installing fine bolts, and the top of the vertical block is provided with a fine threaded hole for installing fine bolts; the transverse block is fixed to the vertical block by fine bolts, and the fine bolts pass through the fine mounting holes and are locked into the fine threaded holes.
4. The connection structure between the rack and the core-pulling bracket according to claim 1, characterized in that, The pin is clearance-fitted with the transverse insertion hole.
5. The connection structure between the rack and the core-pulling bracket according to claim 1, characterized in that, The vertical insertion hole is a square hole.
6. The connection structure between the rack and the core-pulling bracket according to claim 1, characterized in that, The vertical insertion hole is located in the middle of the horizontal direction on the bottom surface of the core-pulling bracket.
7. The connection structure between the rack and the core-pulling bracket according to claim 1, characterized in that, The top of the vertical insertion hole is connected to the middle of the horizontal mounting groove.
8. The connection structure between the rack and the core-pulling bracket according to claim 3, characterized in that, The fine mounting hole is located in the middle of the transverse block.