What is the inclined top mold?

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What Is The Inclined Top Mold?
Definition
The inclined top mold is also known as the inclined tip. It is the mechanism used to mold the
internal barbs of the product in the mold design. It is suitable for relatively simple barbs.
Typical inclined roof mechanism
Type of mold
There are many methods for mold classification.
Classified according to the mold structure, such as a single process die, compound die, etc.;
Classified according to the object of use, such as automobile cover mold, motor mold, etc.;
According to the nature of processing materials, such as molds for metal products, molds for
non-metallic products, etc.;
Classified by mold manufacturing materials, such as cemented carbide molds, etc.; classified by
process properties, such as drawing dies, powder metallurgy dies, forging dies, etc.
Some of these classification methods cannot fully reflect the characteristics of various mold
structures and forming processes, as well as their useful functions. To this end, a comprehensive
classification method based on the process nature and use of molds for forming processing is
used to divide molds into ten categories, and they can be divided into several small groups
according to mold structure, materials, use functions, and mold making methods. Class or variety.

No. Type of mold Molding process nature and use object
1. Stamping die (die)
Punching dies (none, less waste punching, refurbishment, smooth punching, deep hole punching
fine punching dies, etc.), bending dies, drawing dies, single-step dies (punching, bending, drawing,
forming, etc.), compound Die, progressive die; automobile cover die, combined die, motor silicon
steel die
Sheet metal stamping
2. Plastic mold
Compression molds, extrusion molds, injection molds (vertical, type, angle injection molds);
thermosetting plastic injection molds, extrusion molding molds (pipes, thin-film flat heads, etc.)
foam molding molds, low tool bubbles Injection molding dies, blow molding dies, etc.
Plastic products forming plus Huangyan process (thermosetting and thermoplastic molding
compounds)
3. Die-casting mold
Die casting mold for hot chamber die casting machine, die casting mold for vertical cold chamber
die casting machine, die casting mold for ministerial cold chamber die casting machine, die
casting mold for full vertical die casting machine, non-ferrous metals (zinc, aluminum, copper,
magnesium alloy) die casting, Ferrous die casting mold
Nonferrous metal and ferrous metal pressure casting forming process
4. Forging dies
Die forging and forging dies for large presses, forging dies for screw presses, forging dies for flat
forging machines, roll forging dies, etc.; cold heading dies for various fasteners, extrusion dies,
wire drawing dies, liquid forging dies, etc.
Metal parts are formed by forging and extrusion
5. Metal mold for casting
Metal models used when casting various metal parts
Metal casting process
6. Powder metallurgy mold
Forming die:
Manual mold: solid unidirectional pressing, solid bidirectional pressing manual mold; solid
floating pressing mold
Motorized die: large section solid floating stamper, pole palm unidirectional stamper, sleeve
unidirectional and bidirectional stamper, sleeve type floating stamper
Plastic mold:
Manual mold: radial shaping mold, full shaping mold with outer step sleeve, shaping mold with
spherical parts, etc.
Motorized mold: automatic shaping mold for stepless solid parts, semi-automatic shaping buns
for shaft sleeve tie rod, automatic shaping mold for shaft sleeve, automatic shaping mold for the
sleeve, full shaping automatic mold with outer steps and spherical sleeve for an outer sleeve, etc.
Pressing of powder products to form Huangyan art. The main mold electrical processing

equipment is used for copper-based and iron-based powder products; mechanical parts, tool
materials, and products hot parts, etc.
7. Glassware mold
Blow-blow molding of the bottle and can molds, press-blow molding of a bottle and can molds,
glassware molds, etc.
Glass product forming process
8. Rubber Mold
Rubber mold, extrusion mold, injection mold. Rubber tire mold, "O" seal rubber mold, etc.
Rubber press forming process
9. Ceramic mold
Forming metal mold for various ceramics and other products
Ceramic products forming process
10. Economical mold (simple mold)
Low melting point alloy forming die, thin plate die, laminated die, silicone rubber dies, epoxy
resin dies, ceramic precision casting dies, laminated cavity plastic dies, rapid electroforming
forming die, etc.
Applicable to many varieties and small batches of industrial product molds, with high economic
value.
Structure and composition
Structure and composition of injection mold
1. Molded parts
Parts that give shape, structure, and size to the molding material are usually composed of cores
(plugs), concave mold cavities, threaded cores, and inserts.
2. Pouring system
It is a channel that leads molten plastic from the nozzle of the injection machine to the closed
mold cavity, usually composed of the main channel, the branch channel, the gate, and the cold
material well.
3. Guide parts
In order to ensure that the movable mold and the fixed mold can be accurately aligned when
they are closed, the guide parts are provided for guiding and positioning. It is composed of
guideposts and guides sleeves, and some molds are also provided with guide parts on the ejector
plate to ensure The demoulding mechanism moves smoothly and reliably.
4. Demoulding mechanism
The device for realizing the demoulding of plastic parts and the pouring system has many
structural forms. The most commonly used demolding mechanisms are ejector rod, ejector tube,
ejector plate, and pneumatic ejector. Generally, ejector rod, reset lever, slingshot and ejector rod
fixing plate, Top plate (top ring) and top plate guidepost/guide sleeve, etc.
5. Core pulling mechanism
For plastic parts with side holes or undercuts, before being ejected and demolded, they must be
pulled sideways or separated from the slider (side parting) to demold smoothly.

6. Mold temperature adjustment system
In order to meet the mold temperature requirements of the injection molding process, a mold
temperature adjustment system (such as cooling water, hot water, hot oil, and electric heating
system, etc.) is needed to adjust the mold temperature.
7. Exhaust system
In order to expel the gas in the mold cavity smoothly, an exhausted groove is often set at the
mold parting surface, and the gap between the pushrods or other moving parts (such as sliders)
of many molds can also play the role of the exhaust.
8. Other structural parts
Refers to the parts (such as fixed plate, moving/fixing template, supporting the head, supporting
plate and connecting screw, etc.) set to meet the requirements of the mold structure.
Ejector
Seven kinds of the ejection mechanism
1. Push block ejection mechanism
Flat-plate flanged plastic parts, if the mold adheres with the push plate, the push block ejection
mechanism should be used. Because the push block is an integral part of the shape cavity, it
should have higher hardness and lower surface roughness.
There are two types of reset: one is to rely on plastic pressure, and the other is to use a reset
lever.
Second, the use of molded parts ejection mechanism
Due to the relationship between the shape of the structure and the plastic used, some ejection
mechanisms such as ejector rods, ejector tubes, push plates, and push blocks should not be used.
In this case, molding inserts or female molds can be used to bring out the plastic parts. The push
block mentioned above belongs to the molding insert ejection mechanism.
3. The multi-component comprehensive ejection mechanism
It refers to synthesizing the ejection mechanisms mentioned above to achieve the purpose of
ejection. Commonly used are top rod and top plate, top tube and top plate
4. Air pressure release mechanism
The use of air pressure demolding requires the setting of compressed air passages and valves.
The processing is relatively simple, suitable for the demoulding of light, thin soft plastics.
Fifth, the inclined slide-out mechanism
When the plastic parts have inner and outer holes or undercut that are different from the mold
opening direction to prevent the plastic parts from being demolded directly, the oblique slider
demolding mechanism must be used. That is, the parts with side holes or undercuts will be made
into movable cores. When the plastic part is demoulded, the movable core is first drawn out, and
then the plastic part is ejected from the mold. The mechanism that completes the extraction and
reset of the movable core is called the core pulling mechanism.
Three basic forms of inclined slide core-pulling mechanism:
1. The direction of core pulling is perpendicular to the direction of mold opening
2. The direction of core pulling and the fixed mold are offset by a certain angle

3. The direction of core-pulling and the deviation of the moving mold by a certain angle
Design of parts of inclined slide core-pulling mechanism
1. Design of inclined guidepost (oblique pin)
1. 1 The length of the inclined guide column and the calculation of the minimum opening stroke
required
1. 2 Calculation of the bending force on the inclined guide column
1. 3 Dimensional design of inclined guide column
1. 4 Bevel guide column design
1. 5 Installation and fixed form and surface requirements of the inclined guide column
2. Design of the slider
2.1 Connection form of core and slider
2.2 Slide guide form
2.3 Design of the positioning device of the slider
3. Design of compression wedge
3.1 Form of pressure wedge
3.2 Wedge angle of pressure wedge
Interference phenomenon during core pulling and design of first reset mechanism
The commonly used first reset mechanism has the following forms:
1. Wedge slider first reset mechanism
2. Swing lever first reset mechanism
3. Lever first reset mechanism
4. Deflection lever first reset mechanism
5. Reset mechanism of connecting rod at the first
6. Spring first reset mechanism
Structure type of inclined guide column parting and core pulling mechanism
1. The inclined guide column is in the fixed mode, and the slider is in the form of the moving
mode
2. The inclined guide column is in the moving mode, and the slider is in the fixed mode.
3. The structure of the fixed mold with the inclined guide column and the slider
4. The structure of the inclined guide column co-located with the moving mold
Fixed-distance type tensioning mechanism
A. Spring screw type
B. Swing hook type
C. Skateboard type
D. Guide column type
6. Bending pin type and core pulling mechanism
The principle is the same as that of the inclined guide column core-pulling mechanism, the
difference is that the inclined guide column is replaced by a bent pin with a rectangular
cross-section in structure. Its advantage is that the inclined angle can be made larger.
7. Type of inclined guide groove and core pulling mechanism

Oblique tip design and precautions
Oblique tip design and precautions:
1. In the design of the inclined tip, the shorter direction should be taken as far as possible in the
direction of ejection.
2. When calculating the mold opening angle of the inclined tip, only take a large amount, and the
angle should not exceed 10° as the principle. In addition, it is necessary to consider that the
backward stroke of the inclined tip opening mold may lead to the deviation of the finished
product, so L should take 4/ 5H, part of the mold 4/5A, A°may exceed 10°or more, then take 10°
and protrude the thimble from the male mold surface by 0.5-1mm for positioning.
3. The top of the inclined tip generally needs to be slightly lower than the public mold by
0.05mm.
4. If there is a protrusion on the inclined tip (by the hole), the draft angle should be increased.
The angle is preferably above 3°, and it can be made up to 6°.
5. The deflection of ejection should be considered in the design of the large inclined tip, so it is
best to make the base directly above the KO hole.
6. The design of the large oblique tip should prevent the forward tilt and the swinging force that
may occur when the left and right are unevenly ejected. So it is best to set up the T-shaped
groove and the tail groove.
7. When there is a slanted tip, it is best to install EGP to prevent the lateral force component from
affecting the smooth ejection when the slanted tip moves.
8. When the head of the inclined tip is broken by the insertion, spring is added under the return
pin to protect the broken surface of the inclined tip.
9. When designing the inclined tip, pay attention to the positioning of the male side of the
finished product to prevent the finished product from being driven when the inclined tip moves.

What is the inclined top mold?

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